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29 results about "Magnetohydrodynamics" patented technology

Magnetohydrodynamics (MHD; also magneto-fluid dynamics or hydro­magnetics) is the study of the magnetic properties and behaviour of electrically conducting fluids. Examples of such magneto­fluids include plasmas, liquid metals, salt water, and electrolytes. The word "magneto­hydro­dynamics" is derived from magneto- meaning magnetic field, hydro- meaning water, and dynamics meaning movement. The field of MHD was initiated by Hannes Alfvén, for which he received the Nobel Prize in Physics in 1970.

Device for hydrogen production with magnetic field support for improved beading of hydrogen gas bubbles on the surface of the electrolyzer cathode tubes, as well as a modified separating layer for the diaphragm zone to prevent direct gas bubble turbulence between the generated hydrogen and oxygen gas bubbles.

ActiveDE202025000611U1CellsElectrolytic agentMagnetohydrodynamics
external magnetic field - coil with right-hand winding (4) resting on the outer surface of the annular cathode electrode as an encompassing device to generate a magnetic field which, in interaction with the electrolyte current, causes a "Lorentz force" to magnetohydrodynamically accelerate the faster detachment of hydrogen gas bubbles from the outer cathode surface
Owner:HÄUSLER KARSTEN

A method of curing meat by vacuum circulation

PendingCN122250623AFood scienceMagnetohydrodynamicsCell membrane
The application relates to the technical field of meat processing, in particular to a vacuum circulation pickling method for meat. The method comprises the following steps: submerging meat pieces to be pickled in pickling liquid added with 0.1% hematin iron; first, applying a transient high-voltage electromagnetic pulse to precisely perforate the cell membrane of the meat; then, applying an alternating vortex magnetic field with a specific frequency; utilizing the high-frequency micro-vibration of the hematin iron in the magnetic field to generate a magnetohydrodynamic effect, expand the micro-pore channel and pump the pickling material molecules into the cell interior; finally, combining vacuum circulation alternating treatment to further press the pickling material into the tissue gap. The added hematin iron significantly enhances the promotion effect of the magnetic field on the pickling material delivery, and the pickling time is shortened to 30 minutes or less. It is proved through measurement that the pickling liquid absorption rate of the process is high, the penetration reaches the geometric center of the meat pieces, and the integrity and water holding capacity of the meat structure are perfectly preserved.
Owner:YUNNAN AGRICULTURAL UNIVERSITY

Method for electrically reducing carbon dioxide by using magnetic field enhanced membrane electrode electrolytic tank

The invention discloses a method for electrically reducing carbon dioxide by using a magnetic field enhanced membrane electrode electrolytic cell, and relates to the technical field of electrochemistry, the method comprises the following steps: S1, mixing a catalyst with sludge pyrolysis coke to obtain a composite catalyst; s2, preparing a gas diffusion electrode by adopting a composite catalyst; s3, assembling a membrane electrode electrolytic tank by a gas diffusion electrode, an anode, an anion exchange membrane, a cathode collector plate, an anode collector plate and an electromagnet, and injecting electrolyte; and S4, electrifying the electromagnet to form a stable magnetic field, introducing CO2, and switching on a power supply of the electrolytic tank to carry out electroreduction of CO2. Through compounding of the catalyst and the sludge pyrolysis coke and arrangement of the electromagnet in the membrane electrode electrolytic tank, the magnetohydrodynamic effect is enhanced, the mass transfer process of CO2 and products is enhanced, and efficient electric reduction of CO2 to generate formic acid is realized.
Owner:HEFEI CEMENT RESEARCH AND DESIGN INSTITUTE CO LTD

Arc simulation method of HSS under clean air insulation and related device

PendingCN121683618ADesign optimisation/simulationThermodynamicsMagnetohydrodynamics
The invention discloses an electric arc simulation method of an HSS under clean air insulation and a related device, and the method comprises the steps: taking clean air as an insulating medium and an arc extinguishing medium, and building a two-dimensional axisymmetric geometric model of a DC high-speed parallel switch arc extinguishing chamber; calculating physical property parameters of the electric arc in the clean air based on the geometric model, wherein the physical property parameters comprise thermodynamic properties and transportation parameters; constructing a magnetohydrodynamic model according to a Navier-Stokes equation and the physical property parameters, wherein the magnetohydrodynamic model comprises a fluid equation and an electromagnetic field equation; based on a preset k-epsilon turbulence model, the magnetohydrodynamic model is solved through Fluent, and arc airflow field parameters are obtained; and performing arc simulation operation according to the arc airflow field parameters to obtain a target clean air arc. The technical problem that existing HSS application is not environment-friendly due to the lack of research on plasma characteristics and arc extinguishing capability of clean air HSS arcs in the prior art can be solved.
Owner:ELECTRIC POWER RES INST CHINA SOUTHERN POWER GRID CO LTD +1

Method for simulating island tail flow induced electromagnetic field based on magnetohydrodynamics

ActiveCN121981016ADesign optimisation/simulationCAD numerical modellingMagnetohydrodynamicsMaxwell's equations
The invention relates to the technical field of ocean geophysical exploration, and provides an island tail flow induced electromagnetic field simulation method based on magnetohydrodynamics. The method comprises the following steps: constructing a three-dimensional island wake flow fluid dynamic model; coupling an equation for describing seawater motion with a Maxwell equation set for describing electromagnetic field evolution, and constructing a magnetohydrodynamic control equation set; modeling the turbulence effect of seawater movement; the magnetohydrodynamics control equation set is solved, the ocean current velocity field and the induced electromagnetic field intensity are obtained, and the induced electromagnetic field intensity comprises the induced electric field intensity and the induced magnetic field intensity. The three-dimensional island wake flow hydrodynamic model constructed by the method comprehensively considers the seawater vertical layering flow velocity profile and background geomagnetic field parameters, and the constructed magnetohydrodynamic control equation set fully considers the seawater motion, so that the model can truly reflect a terrain-flow field-electromagnetic field multi-scale coupling mechanism.
Owner:OCEAN UNIV OF CHINA

A supercapacitor working electrode, a preparation method thereof and a supercapacitor

PendingCN122337898ACapacitanceMagnetohydrodynamics
This application discloses a supercapacitor working electrode, its fabrication method, and the supercapacitor itself, belonging to the field of capacitor technology. The supercapacitor working electrode of this application comprises a conductive substrate and an electrode active layer grown in situ on the surface of the conductive substrate. The electrode active layer comprises an inorganic metal oxide nanocrystalline film, which is a continuous conductive structure formed by the interconnection of single chiral inorganic metal oxide nanocrystals. The supercapacitor working electrode of this application possesses a chiral-induced spin-selectivity effect, achieving spin-polarized charge transport without relying on magnetohydrodynamic convection / Lorentz force driving, effectively improving the specific capacitance, rate performance, and cycle stability of the supercapacitor.
Owner:FUDAN UNIVERSITY

A real-time monitoring fault early warning method for an insulated bus

PendingCN122449290AAnti jammingMagnetohydrodynamics
The application relates to the technical field of insulation bus fault early warning, and discloses a real-time monitoring fault early warning method for an insulation bus, which comprises the following steps: S1, temperature sensors and partial discharge sensors are arranged at key points of the insulation bus; an anti-interference acquisition circuit and a temperature-compensated crystal oscillator differential synchronous acquisition mechanism are adopted to synchronously acquire temperature and partial discharge original signals; S2, the original signals of step S1 are input into an error self-correction model combined with Kalman filtering and LSTM (Long Short Term Memory) to perform calibration and dynamic compensation, and high-fidelity temperature and partial discharge characteristic data are output. The real-time monitoring fault early warning method for the insulation bus improves data fidelity from the source through the anti-interference acquisition circuit and the differential synchronous acquisition mechanism, realizes high-precision calibration of signals in combination with the error self-correction model, and applies the principle of magnetohydrodynamics to partial discharge monitoring to solve the problems that signals are easily submerged and the sensitivity is insufficient in traditional electric measurement methods.
Owner:HUANGGANG XINGHE ALUMINUM IND CO LTD

Apparatus for electrolyte impregnation of a secondary battery, method for electrolyte impregnation of a secondary battery, and method for activation of a secondary battery

An electrolyte impregnation device of a secondary battery according to an embodiment of the present disclosure includes: a transfer part configured to move the secondary battery in a first direction; and a magnetic field application part for applying a magnetic field in a second direction to the secondary battery moved by the transfer part.A magnetic field is applied to an electrolyte flowing in a first direction, causing a magnetohydrodynamic convection flow in the electrolyte, especially a small magnetohydrodynamic convection flow near an electrode, such that, under the synergistic action of such flow force and the buoyancy force received by the bubbles, the bubbles on the surface of the electrode are moved to a gas pocket portion of the secondary battery, thereby removing the bubbles in the electrode assembly, thereby improving the impregnation performance of the electrolyte.
Owner:LG ENERGY SOLUTION LTD

Preparation method of corrosion-resistant and scratch-resistant aluminum alloy electroplated nickel-gold double-plating layer

PendingCN121321141ACellsTanksMagnetohydrodynamicsElectronic industry
The invention relates to the technical field of metal surface treatment and protection, and discloses a preparation method of a corrosion-resistant and scratch-resistant aluminum alloy electroplated nickel-gold double-plating layer, which comprises the steps of surface pretreatment, electroplating liquid preparation, integration of a magnetohydrodynamic stirring system, adoption of a pulse reverse electroplating technology, real-time monitoring of process parameters and the like. A plating solution flow field and an ion migration path are optimized through an alternating magnetic field, the deposition rate is controlled in combination with pulses, and the uniformity and performance of a plating layer are remarkably improved. And the thickness fluctuation of the prepared nickel-gold double-plating layer is within + / -0.1 micron, the hardness is 300-500 HV, the corrosion resistance is excellent, and the nickel-gold double-plating layer is suitable for the fields of aerospace, automobile manufacturing and electronic industry. The method can effectively improve the plating quality of the complex workpiece, and has a wide application prospect.
Owner:SHENZHEN YUETONG TECH CO LTD

Liquid lithium lead loop design optimization method, device, platform and storage medium in strong magnetic environment

PendingCN122334110AMagnetic field couplingMagnetohydrodynamics
This invention discloses a method, apparatus, platform, and storage medium for design optimization of liquid lithium-lead circuits under strong magnetic environment. The method includes: establishing a liquid lithium-lead circuit model, defining basic model parameters, operating boundary conditions, and temperature-dependent physical properties of liquid lithium-lead within the model; dividing the model into multiple computational units, and obtaining the local magnetic field vector at the spatial location of each computational unit based on the strong magnetic field environment parameters under tokamak device operating conditions; obtaining the strong magnetic field coupling calculation results of the liquid lithium-lead circuit model based on the local magnetic field vector at the spatial location of each computational unit; and modifying the model based on these results to output the final liquid lithium-lead circuit design result. This achieves magnetohydrodynamic and thermal-fluid coupling design of the liquid lithium-lead circuit, improving the reliability of the circuit design.
Owner:聚变新能(安徽)有限公司

Line transient breakdown modeling method suitable for construction of distribution network traveling wave detection environment

The invention relates to a line transient breakdown modeling method suitable for construction of a distribution network traveling wave detection environment. The line transient breakdown modeling method is used for solving the problem of transient fault modeling of experimental verification of a traveling wave distance measuring device at present. The method comprises the following steps: S1, constructing a black box Mayr model of an electric arc; considering that the diameter of the arc column is a constant value, the longer the distance between the section of the arc column and the circle center is, the lower the temperature is. S2, constructing a magnetohydrodynamic model; by means of a finite element method, grid division is conducted on the electric arc, solving is conducted through a multi-physical field coupling relation, and physical distribution characteristics in the electric arc are obtained; s3, constructing an instantaneous breakdown arc model; construction is carried out through a COMSOL system, the COMSOL system provides a geometric module, and drawing or structure size information of a line is utilized; s4, simulating to obtain instantaneous breakdown current and voltage waveform analysis; the metal shielding current is the arc current of the fault, and the wire core voltage is the arc voltage.
Owner:SUQIAN POWER SUPPLY COMPANY OF JIANGSU PROVINCE POWER

Device for detecting helium leakage by using magnetic fluid

PendingCN121917152AFluid-tightness measurementPipeline systemsSolenoid valveMagnetohydrodynamics
The invention belongs to the field of helium leakage detection, and particularly relates to a device for detecting helium leakage by using magnetic fluid, an outer ring wall and an inner ring wall are connected between a first ring structure and a second ring structure, and the outer ring wall is coaxially arranged outside the inner ring wall; the electromagnetic field generator is arranged in a first cavity between the outer ring wall and the inner ring wall; the magnetic induction sensor is arranged in the first cavity, or the electromagnetic field generator is arranged on the inner wall of the inner ring wall; when the device for detecting helium leakage through the magnetic fluid is arranged on a helium conveying pipeline, a second cavity formed by the inner ring wall, the helium conveying pipeline, the first annular structure and the second annular structure communicates with a storage cavity in the first annular structure through a first electromagnetic valve arranged on the first annular structure; the second cavity is communicated with a recovery cavity in the second annular structure through a second electromagnetic valve arranged on the second annular structure; the helium leakage detector can realize helium leakage detection in a non-vacuum environment, and has the advantages of being convenient to carry and reducing the helium detection difficulty and cost.
Owner:CHINA NAT PETROLEUM CORP

Circuit breaker valve plate motion state detection method and device, equipment and medium

PendingCN122063424AEnsemble learningKernel methodsMagnetohydrodynamicsWorking environment
The invention provides a circuit breaker valve plate motion state detection method and device, equipment and a medium, and relates to the technical field of circuit breaker detection, and the method comprises the steps: determining position parameter thresholds of a valve plate at target moments under different on-off working conditions based on a magnetohydrodynamic simulation model of a target circuit breaker; determining a current target on-off working condition type of the target circuit breaker according to the real-time motion signal of the target circuit breaker; and analyzing according to the position parameter threshold value corresponding to the target on-off working condition type and the actual position of the target moment, and determining the real-time motion state of the circuit breaker valve plate. The current target on-off working condition type of a target circuit breaker is determined by acquiring a real-time motion signal of the target circuit breaker, so that the influence of the working environment where a valve plate is located is considered when the motion state of the valve plate is subsequently determined, and position parameter thresholds at target moments under different on-off working conditions are determined by using a magnetohydrodynamic simulation model; and the motion state of the valve plate is determined efficiently and accurately based on the actual position of the valve plate.
Owner:YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST

Magnetohydrodynamic angular velocity sensor

The application relates to the technical field of non-electric quantity measurement testing, in particular to a magneto-hydrodynamic angular velocity sensor which comprises a cover plate, a shell and a base, wherein the shell is a cylindrical shell body, the inside of the shell body comprises a first cavity and a second cavity, the cover plate covers the upper end of the first cavity, and the base is fixed to the lower end of the second cavity; the inside of the first cavity is provided with an embedded circuit board and a connector, the embedded circuit board is connected with the outside through the connector and is used for outputting a signal to the outside; the inside of the second cavity is provided with a magnetic core assembly, the magnetic core assembly is connected with the embedded circuit board and is used for generating a current signal and transmitting the current signal to the embedded circuit board. The application has the characteristics of simple structure, convenient assembly, high measurement precision, wide frequency band, no mechanical saturation and high reliability, and is a key component for solving the problem of high-bandwidth micro-angle vibration measurement of a spacecraft.
Owner:LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH

Energy storage arrangement

The invention relates to an energy storage arrangement (1) with a redox energy storage device (7) comprising several redox flow cells (8) and connected via channel systems (4) to at least two electrolyte containers (3) in each of which an electrically conductive electrolyte (5) is stored, and an MHD module (10) comprising at least one evaluation and control unit (12) and at least two magnetohydrodynamic pump modules (20) for each of the individual redox flow cells (8), wherein the at least one evaluation and control unit (12) is configured to control the magnetohydrodynamic pump modules (20), wherein the magnetohydrodynamic pump modules (20) each comprise a magnet device and an electrode device, which is configured toto conduct an electric current provided by the at least one evaluation and control unit (12) through the corresponding electrically conductive electrolyte (5) in a channel section of a corresponding channel system (4), so that, in conjunction with a magnetic field generated by the magnetic device, a Lorentz force is created which selectively accelerates the electrically conductive electrolyte (5) in the corresponding channel section, so that a resulting pressure build-up causes a desired volume flow of the electrically conductive electrolyte (5) through the corresponding channel system (4) and the individual redox flow cells (8) of the redox energy storage device (7).
Owner:ROBERT BOSCH GMBH

Simulation method for three-dimensional full-space plasma response in east tokamak

The present invention discloses a simulation method for three-dimensional full-space plasma response in EAST tokamak. In numerical simulation of plasma response in an EAST tokamak device, firstly, single frequency waves with different frequencies and amplitudes are selected according to experiment needs, to design waveforms of an external perturbation current field; then selected single frequency current field waveforms are respectively used as driving terms to solve magnetohydrodynamic equations containing an external driving current field to solve the distribution of the single frequency magnetic response signals in a three-dimensional full space; and finally, multiple groups of the single frequency magnetic response signals are superimposed and converted into a time domain space to obtain the three-dimensional full-space distribution of plasma magnetic response signals at any time. The present invention realizes the corresponding full-space distribution of plasma at any time in the process of simulating EAST tokamak discharge experiments, and makes up for the deficiency that the distribution of full-space magnetic signals cannot be obtained by experimental measurement. The present invention has accurate simulation results and strong practicality, and is a stable and efficient numerical simulation method.
Owner:DALIAN UNIV OF TECH

High-pressure-resistant precession vortex flowmeter

The utility model discloses a high pressure resistant type precession vortex flowmeter which comprises a vortex flowmeter body, a pair of convex drainage tubes and a pressure intensity adjusting structure, the convex drainage tubes are installed on the two sides of the vortex flowmeter body respectively, and the pressure intensity adjusting structure is installed on the inner sides of the convex drainage tubes. The utility model relates to the technical field of vortex flow meters, firstly, a core buffer adjusting assembly of the vortex flow meter adopts a three-stage hydraulic expansion structure, the hydraulic energy conversion efficiency is enabled to break through 85% by utilizing the Laval nozzle effect, 0.1-1.5 MPa pressure intensity adjustment can be completed within 5ms, and the response speed is increased by three times compared with that of a traditional hydraulic adjusting system; and secondly, the buffer assembly creatively applies the magnetohydrodynamics principle, and by means of the coupling effect of a conical shunt block and an annular magnetic field, the cascade conversion of fluid kinetic energy is achieved while the shunt precision is kept to be + / -0.02 mm, and the eddy current inhibition efficiency reaches 92%.
Owner:SHANDONG LIANGPU INTELLIGENT INSTR CO LTD

Method and device for solving three-dimensional nonlinear coupling of poloidal spectral magnetohydrodynamics

PendingCN122548984AMagnetohydrodynamicsNonlinear flow
This invention discloses a method and apparatus for solving three-dimensional nonlinear coupled angular spectral magnetohydrodynamics, relating to the fields of three-dimensional perturbation simulation of fusion plasma and angular spectral mode discretization. The method includes: acquiring the angular spectral modal states on a substrate computational grid; transforming the modal fluid flux and modal magnetic flux to an angular node space or weak integral sampling space satisfying dealiasing conditions; calculating the three-dimensional nonlinear fluid update quantity and magnetic update driving quantity; back-projecting the calculation results into retained modes, and forming an update of modes to be accepted. By coupling the calculation of nonlinear flux, non-ideal terms, or internal source terms in the sampling space and back-projecting to retain modes, non-axisymmetric three-dimensional perturbations can be expressed at a lower modal cost while maintaining modal magnetic confinement.
Owner:HUNAN TAIGUAN TECH CO LTD

Manufacturing method of magnetic field enhanced tungsten alloy sealing ring and tungsten alloy sealing ring

PendingCN121320954APiston ringsVacuum evaporation coatingChemical platingMagnetohydrodynamics
The invention discloses a manufacturing method of a magnetic field enhanced tungsten alloy sealing ring and the tungsten alloy sealing ring. The manufacturing method comprises the following steps that the tungsten alloy matrix meeting the size requirement is manufactured; the tungsten alloy matrix is pretreated; the cleaned tungsten alloy matrix is placed in a deposition chamber, and a first soft metal layer is deposited on the surface of the tungsten alloy matrix in the deposition chamber in a physical vapor deposition mode; after deposition of the first soft metal layer is completed, the tungsten alloy matrix is placed in a plating solution, a second soft metal layer is plated on the first soft metal layer in a chemical plating mode, and a high-intensity magnetic field with stable intensity is applied during chemical plating; and the second soft metal layer is cleaned after being machined, and the tungsten alloy sealing ring is obtained through drying after cleaning is completed. The magnetic fluid dynamic effect is generated by introducing an external magnetic field, the mass transfer process of metal ions in a plating solution to the surface of a workpiece is greatly enhanced, the chemical plating deposition rate is increased by 20-50%, the production period is remarkably shortened, and the cost is reduced.
Owner:CHENGDU ZHONGKE WISH INSTR CO LTD

Device with diameteral magnetic arrays for installation in magnetic subs for the remediation and mitigation of scale in production columns

The present invention refers to a device with diametral magnetic arrays for installations in magnetic SUBs, aiming the remediation and mitigation of inorganic and organic scales in production columns. The proposed magnetic device meets several specific criteria based on the magnetohydrodynamic model (MHD). After applying the said device with the proposed magnetic field, an efficiency of the scale inhibition was experimentally observed through laboratory tests, obtained from the values of the masses encrusted in the walls of the experimental bench system in the laboratory, with respect to the application without magnetic field. The device described herein can be installed in any pipeline used to transport fluids, including underwater pipelines for oil wells. These fluids can be oils, lubricants, gases, steams, water, petroleum or liquids in general.
Owner:CENT BRASILEIRO DE PESQUISAS FISICAS +1

Magnetic field enhanced water electrolysis hydrogen production method and system based on Halbach array

PendingCN122081979ACellsEpoxyMagnetohydrodynamics
The invention relates to a Halbach array-based magnetic field enhanced water electrolysis hydrogen production method and system, and belongs to the technical field of water electrolysis hydrogen production. The method solves the technical problems that bubbles are accumulated due to stress concentration of a square alkaline electrolytic cell, and the electrolytic efficiency is limited due to the fact that the number of magnets is large, magnetic field intensity is weak and distribution is uneven in a traditional magnetic field auxiliary technology. According to the technical scheme, a high-field-intensity uniform single-direction magnetic field is constructed by integrating a Halbach permanent magnet array in an end plate and a bipolar plate of an electrolytic bath, and bubbles are promoted to be stripped from the surface of an electrode by utilizing a Lorentz force and a magnetohydrodynamic effect generated by interaction of the magnetic field and electrolytic current; and meanwhile, the corrosion resistance is improved by combining a nonmetal electrolytic cell structure such as a glass fiber reinforced epoxy resin pole frame and a graphite lining. The method has the beneficial effects that the bubble desorption capacity is remarkably enhanced, the mass transfer process is improved, the hydrogen evolution and oxygen evolution reaction rate is increased, and therefore the electrolysis efficiency is improved.
Owner:CHONGQING UNIV

Rotating shaft seal utilizing magnetohydrodynamic effect and control method

PendingCN121803653AEngine sealsMagnetic liquidsRotational axisMagnetohydrodynamics
The invention provides a rotating shaft seal utilizing the magnetohydrodynamic effect and a control method. The rotating shaft seal comprises a sleeve, an annular electrode pair and a magnetic field generator. The rotating shaft is sleeved with the sleeve, the annular electrode pair comprises an annular outer electrode plate and an annular inner electrode plate, the sleeve is fixedly sleeved with the inner electrode plate, the outer electrode plate is arranged on the periphery of the inner electrode plate, an annular gap communicated with the sealing cavity is defined between the outer electrode plate and the inner electrode plate, and the annular gap is filled with conductive magnetic fluid; the magnetic field generator comprises an annular magnetic core and a superconducting coil spirally wound on the magnetic core, and the magnetic core is arranged on the periphery of the outer electrode plate; potential lines generated by the annular electrode pair and magnetic lines generated by the magnetic field generator are orthogonal in the conductive magnetic fluid, so that axial Lorentz force is generated in the conductive magnetic fluid to resist the pressure of a sealed medium in the sealing cavity, and sealing is formed.
Owner:NANJING TECH UNIV

Energy storage arrangement

The invention relates to an energy storage arrangement (1) with a redox energy storage device (7) which is connected via channel systems (4) to two electrolyte containers (3), an MHD module (10) which comprises two magnetohydrodynamic pump modules (20) and an evaluation and control unit (12), and at least two valve assemblies (30), wherein the evaluation and control unit (12) is configured to control fluid valves of the valve assemblies (30) such that active redox flow cells (8) of the redox energy storage device (7) are fluidically connected to the channel systems (4) and inactive redox flow cells (8) of the redox energy storage device (7) are separated from the channel systems (4), wherein the evaluation and control unit (12) is further configured to control the two magnetohydrodynamic pump modules (20), each of which comprises a magnet device (26) and an electrode device (22), which is configured toto conduct an electric current provided by the evaluation and control unit (12) through the electrolyte (5) in a channel section (28) of a corresponding channel system (4), so that, in conjunction with a magnetic field generated by the magnetic device (26), a Lorentz force is created which selectively accelerates the electrolyte (5) in the channel section (28), so that a resulting pressure build-up causes a volume flow of the electrically conductive electrolyte (5) through the channel system (4) and the active redox flow cells (8).
Owner:ROBERT BOSCH GMBH

A laser in-situ welding method and system for SiC particle-reinforced aluminum matrix composites and its modeling.

This invention belongs to the field of laser in-situ welding technology and discloses a laser in-situ welding method for SiC particle-reinforced aluminum matrix composites and its modeling method. The method includes: establishing a laser heat source model considering the differences in optical properties of the molten particle surface; establishing a multiphase flow model based on magnetohydrodynamics; and developing a particle migration-heat transfer model based on Discrete Element Model (DEM). The method describes the particle contact force and deformation relationship based on Hertzian contact theory, obtains the contact thermal conductivity of SiC particles using experimental methods, and uses the Discrete Element Model (DEM) method to achieve dynamic tracking of contact and heat transfer; and integrates multi-energy field multiphase coupling modeling of the molten pool, keyhole, and particles. This invention provides a more accurate description of welding thermal behavior: the numerical simulation model established in this invention considers for the first time the differences in optical behavior such as laser absorption, scattering, and reflection between the fluid and the SiC particle surface, making the characterization of energy transport behavior and temperature evolution during the welding process more accurate.
Owner:HUAZHONG UNIV OF SCI & TECH

Magnetohydrodynamics-Inspired Coupling for Typed Latent Spaces in Persistent Cognitive Machines

Systems and methods for persistence of memory on a persistent cognitive machine (PCM) that uses a continuous, differentiable, cognitive manifold in geometric space to allow a computer to engage in human-like thought processes. A PCM with cognitive manifold performs cognition on a cognitive manifold in a continuous, differentiable, cognitive manifold in geometric space as opposed to probabilistic prediction in a discontinuous, anisotropic, and topologically fractured vector space. A mechanism inspired by magnetohydrodynamics is provided for coupling of typed spaces where thoughts on a cognitive manifold are structured as typed entities.
Owner:ATOMBEAM TECH INC

Simulation method for arc erosion resistance of insulating material surface based on magneto-hydrodynamics

The application provides a simulation method for arc ablation resistance of an insulating material surface based on magnetohydrodynamics, and belongs to the field of insulating material performance detection. The method comprises the following steps: establishing an arc ablation resistance model of the insulating material surface; constructing a magnetohydrodynamic control equation set; setting a model boundary condition; iteratively solving the magnetohydrodynamic control equation set through a finite element simulation software to obtain a temperature distribution diagram of the insulating material under different arc ablation times, and judging the arc ablation resistance degree of the insulating material through comparison with a TGA curve of the insulating material. The application takes a power frequency alternating current high-voltage arc and an insulating material as simulation objects, is more in line with engineering practice, can simulate the surface arc ablation resistance process of any insulating material by changing physical property parameters of the insulating material, and introduces a material TGA curve to judge the arc ablation resistance performance of the insulating material, thereby providing technical support for insulating material selection of high-voltage switch equipment.
Owner:HEFEI UNIV OF TECH +1

Sequential coupling numerical calculation method for lightning stroke damage analysis of composite material

The invention provides a sequential coupling numerical calculation method for lightning stroke damage analysis of a composite material. The sequential coupling numerical calculation method comprises the following steps: (1) establishing a magnetohydrodynamic model for describing lightning channel evolution; (2) establishing a lightning channel finite element model according to the physical properties and boundary conditions of the composite material; (3) building a finite element model of the composite material according to physical properties and boundary conditions of the composite material; (4) obtaining a lightning stroke load; (5) calculating the response rule of the composite material under the lightning stroke electrothermal coupling effect; and (6) transmitting response data of the composite material to the lightning channel model, and updating boundary conditions of the model. Based on a traditional series interaction solution method, an alternating coupling calculation mode is adopted, and dynamic boundary updating in the calculation process between a lightning channel and a composite material is achieved by combining radial basis interpolation and a dynamic grid technology, so that sequence dynamic coupling solution of lightning stroke response of the composite material under the action of lightning current is achieved.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

A spherical ferroalloy powder material, a preparation method thereof and use thereof

ActiveCN116391051BMaterial nanotechnologyNanomagnetismMagnetohydrodynamicsSuperalloy
This invention relates to a spherical ferroalloy powder material, its preparation method, and its applications. By selecting an Fe and La-based alloy system and simultaneously adding special alloying spheroidizing and corrosion-resistant elements, spherical dispersed particles rich in Fe and containing dissolved spheroidizing elements in the initial alloy melt during solidification are dispersedly precipitated within a La-rich matrix phase. By removing the La-rich matrix phase, spherical ferroalloy powder materials with particle sizes ranging from nanometers to tens of micrometers are obtained. This method is simple and can prepare spherical ferroalloy powder materials with different morphologies, including nanometer, submicron, and micrometer sizes, showing promising applications in powder metallurgy, metal injection molding (MIM), 3D printing, magnetic materials, heat-resistant materials, high-temperature alloys, coatings, electrothermal materials, microwave absorbing materials, and magnetohydrodynamics.
Owner:赵远云

Environment-friendly gas arc performance rapid evaluation method and system based on operator learning

The invention discloses an operator learning-based environment-friendly gas arc performance rapid evaluation method and system, and relates to the technical field of surrounding gas arc performance. The method comprises the following steps: receiving gas parameters of environment-friendly gas; inputting the gas parameters into a pre-constructed one-dimensional arc model to generate standard sample data, preprocessing the standard sample data, and establishing a training data set according to the preprocessed standard sample data; constructing a one-dimensional arc operator model based on operator learning, and training the one-dimensional arc operator model based on the training data set; and quickly predicting arc characteristics based on the trained one-dimensional arc operator model. The arc temperature field distribution is modeled and predicted by using the depth operator network, the problems of complex simulation calculation and long time consumption of the traditional magnetofluid dynamics are solved, the rapid and low-cost evaluation of the arc performance is realized, and the possibility is provided for real-time analysis in engineering application.
Owner:SOUTHEAST UNIV