35 results about "Fluid particle" patented technology

The application relates to a fluid simulation method and device, and relates to the technical field of computer graphics. The method comprises the following steps: setting one or more disturbance packages in a space where a fluid object is located, each of the one or more disturbance packages comprising at least one fluid particle, and the initial velocities of the fluid particles in the same disturbance package being the same; and updating the initial velocities of fluid particles outside the one or more disturbance packages according to the gravitational action of the fluid particles in the one or more disturbance packages on the fluid particles outside the one or more disturbance packages.

The application discloses a kind of SPH steady flow processing method and related equipment, method includes the input entrance pressure data is converted into entrance speed data;Entrance speed data is based on setting virtual particle;And the data information of fluid particle is updated by the interaction between virtual particle and the fluid particle to be processed, and fluid particle data is judged based on setting parameter threshold, and the particle field information of output is obtained.The application embodiment can be converted into entrance speed data by the entrance pressure data, and virtual particle is set to simulate fluid particle, reduce the speed shock and data noise caused by particle simulation calculation based on entrance pressure, reduce the accumulation of entrance particle simultaneously, improve the stability of entrance boundary, so as to improve the convergence speed and processing efficiency of steady flow simulation.The application can be widely applied in computer simulation and data processing technical field.

Fluid simulation methods and apparatuses, relating to the technical field of computer graphics. A method comprises: providing one or more perturbation packets in a space where a fluid object is located, wherein each of the one or more perturbation packets comprises at least one fluid particle, and the initial velocities of fluid particles in the same perturbation packet are the same; and, on the basis of the attractive effect of fluid particles in the one or more perturbation packets on fluid particles outside the one or more perturbation packets, updating the initial velocities of the fluid particles outside the one or more perturbation packets.

An improved and more efficient three-dimensional flow high-pressure fan has a hub (4) with a wheel disk (6) fixed to the outer edge of the rear side. The hub (4) extends forward along the axial direction. Main blades (7) are fixed radially and evenly around the front side of the wheel disk (6), and thrust blades (8) are fixed radially and evenly around the rear side of the wheel disk (6). The main blades (7) are three-dimensional twisted three-dimensional flow blades, and the thrust blades (8) are straight blades. A small-volume three-dimensional flow impeller design is adopted to fully adapt to the flow characteristics of the gas in the impeller, reduce flow losses, and achieve a larger gas flow and pressure per unit volume by increasing the rotational speed. Static pressure growth is stable, and the fan operates with low noise. It can also control the velocity distribution of all fluid particles inside, obtain the best flow state inside the impeller, and enhance the stable operation capability of the product in an environment of -30℃ to 50℃. The fan diameter can be reduced by 5%, significantly reducing the weight of the equipment. The energy efficiency is significant, with energy saving effect reaching 80%. Maintenance is convenient, and damaged parts can be quickly replaced, reducing maintenance costs.

The application provides a semi-analytical MPM-DEM coupling numerical simulation method for interaction between debris flow and structures, and relates to the field of geotechnical engineering disaster simulation; fine-grained mud is taken as a continuous medium, and MPM is used for discretization; meanwhile, spherical particles and cluster particles are taken as solid phases, and DEM is used for modeling; structures and boundaries are embedded in the calculation domain in the form of rigid walls. Through grid-particle information exchange and two-way transmission of particle-grid coupling forces, synchronous solution of fluid-solid multiphase coupling is realized. The flow-solid contact force is in a semi-analytical mode; the contact between DEM particles and the contact between DEM particles and walls are accurately calculated based on the Hertz-Mindlin model. The method truly reproduces the collaborative collision, blockage and impact mechanism of boulders and driftwood in the debris flow, and simulates the three-dimensional large-scale situation of millions of fluid particles and ten thousand particles. The simulation results can output key indexes such as the stress time history of the structure, the impact peak value and the blockage rate, thereby providing a reliable numerical basis for debris flow protection.

A fluid-structure interaction (FSI) simulation method for submerged boundaries based on the material point method and positional dynamics includes: a) solving for the solid state and calculating the Lagrangian elastic force of the solid; b) transferring the elastic force of the solid Lagrangian mesh vertices to the Eulerian background mesh; c) solving the Navier-Stokes fluid control equations and continuity equations on the Eulerian background mesh, feeding back the updated mesh flow field information to the particles, and updating the particle state synchronously; d) using a mapping matrix to map the positions of solid particles back to the vertices of the solid Lagrangian mesh, saving the vertex position data and fluid particle data for rendering output. This invention, through the above-mentioned hybrid Lagrangian-Eulerian perspective coupling solution, can realistically simulate the bidirectional coupling between solids of different materials and complex fluids, significantly improving the physical realism and visual fidelity of the simulation scene.

The invention provides a micro-channel fluid simulation method and system, and the method comprises the steps: constructing a D2Q9 model through a lattice Boltzmann method according to a to-be-simulated micro-channel geometric structure, setting basic parameters of the D2Q9 model, and initializing distribution functions of a flow field, a temperature field and a phase field and a corresponding equilibrium state distribution function; respectively executing collision and propagation operations on distribution functions of a flow field, a temperature field and a phase field based on a single relaxation lattice Boltzmann method, and simulating movement among fluid particles, energy transmission and evolution of a two-phase interface; setting boundary conditions of the D2Q9 model, and calculating a macroscopic physical quantity representation simulation result of the fluid at each moment according to an evolution result of each distribution function after collision propagation; and when the D2Q9 model meets a preset simulation termination condition, outputting a D2Q9 model simulation result in a standard data format. According to the scheme, the accuracy of micro-channel internal flow simulation can be improved, and the simulation calculation efficiency is guaranteed.

The application provides a GPU fluid simulation method for real-time interactive application, and relates to the technical field of fluid simulation. The method first uses a particle system to emit a large number of particles, calculates fluid particle positions using a position-based fluid particle simulation algorithm, updates the motion state of the particles, then obtains a smooth fluid surface according to the particle positions through screen space processing, and finally uses a realistic rendering method to color the fluid surface to obtain a water body image. Since the state update of the large number of particles and the pixel-level calculation of the screen space are both large-scale parallel calculations, they are suitable for GPU processing, so all the calculation processes involved in the method are run on the GPU end. The method can be widely applied to various demand scenarios in the fields of industrial simulation and electronic games.

A method of tracking fluid in a conduit includes converting a volume of the conduit to an equivalent fluid particle count and discretizing a fluid flow in the conduit into discrete, quantifiable fluid particles based on a resolution of a sensor assembly connected to an exit of the conduit. The method includes recording entry timestamps for each of the fluid particles upon passing an entrance to the conduit. A real-time movement of each of the fluid particles between the entrance of the conduit and an exit of the conduit is determined, and an analyte measurement for each of the fluid particles is determined. A transit time for each of the fluid particles is determined and displayed along with the analyte measurement for each of the fluid particles.

A fluidic microsystem 100 for manipulating particles 1, 2, 3, for example biological cells, comprises a fluidic channel arrangement 10 configured to receive a flow of a fluid 4 with a flow direction S in which the particles 1, 2, 3 are arranged, and which successively includes in the flow direction S a first analysis section 11A, a first actuator section 12A and a second analysis section 11B, a detector device 20 with a field of view 21 covering the first analysis section 11A and the second analysis section 11B, wherein the detector device 20 is configured for radiation-based detection of at least one particle property of each of the particles 1, 2, 3 in the first analysis section 11A and in the second analysis section 11B, and an actuator device 30 configured to subject each of the particles 1, 2, 3 in the first actuator section 12A to a first actuator step.in particular, comprising at least one of the following: the application of a trigger action, the performance of a measurement, and the application of an actuating force. The fluidic channel arrangement 10 has a reversing section 13 with a first leg 13A, a reversing curve, and a second leg 13B, wherein the first analysis section 11A is arranged in the first leg 13A and the second analysis section 11B is arranged in the second leg 13B adjacent to the first analysis section 11A with respect to a direction transverse to the flow direction S. A particle manipulation method for manipulating particles 1, 2, 3 in a fluidic microsystem is also described.

The application provides a method and system for detecting radial velocity of a flow field, and the system for detecting radial velocity of a flow field is used to generate a common Gaussian light beam and a high-order vortex light beam with a non-zero radial coefficient; the high-order vortex light beam is used to irradiate a measured fluid and pass through the measured fluid to generate target detection light carrying radial information of the fluid, and the common Gaussian light is interfered with the target detection light to generate a heterodyne interference signal; a detector is used to detect the heterodyne interference signal and analyze a Doppler spectrum; and the radial velocity of the measured fluid is determined according to the Doppler spectrum. When the detection light irradiates the measured fluid, fluid particles in the measured fluid move radially in a light spot of a high-order vortex light beam orthographic projection, the application uses the high-order vortex light with an intensity distribution in the radial direction to detect the flow field to generate a Doppler effect, so that the radial velocity of the flow field is detected, and therefore the application has a wide application scenario.

The present application relates to oil pipeline technology field, especially to a kind of method, system and electronic equipment for determining mountainous area oil pipeline leakage diffusion path, method includes: obtaining the mountain model of mountainous area where oil pipeline is located, and calculating the resultant force of flow resistance and gravity component that each fluid particle is subjected to on the mountain surface of mountainous area where oil pipeline is located, and the acceleration of each fluid particle under the action of corresponding resultant force, determine the grid corresponding to each fluid particle in mountain model after each unit step length time, record and according to the grid corresponding to each fluid particle in mountain model after each unit step length time, obtain the diffusion path of fluid leaked from oil pipeline.When the oil pipeline in mountainous area leaks, the initial velocity of leakage is relatively large, the present application considers the influence of initial velocity of leakage on leakage diffusion path, so that the determined leakage diffusion path is more accurate and efficient.

The invention relates to an underwater contact explosion-oriented SPH shell particle boundary condition processing method. According to the SPH shell particle boundary condition processing method for underwater contact explosion, the penetration process of particles is divided into three stages: when fluid particles do not penetrate through a wall surface, when the distance between the fluid particles and the wall surface of a shell model reaches a critical value, and when the fluid particles penetrate through the wall surface. When the fluid particles i do not penetrate through the wall surface, a spatial repulsion model proposed by Monaghan and the like is adopted; when fluid particles i penetrate through the wall surface, a repulsive force-restoring force coupling model is constructed. In order to further improve the stability, a viscous damping force model is introduced, and the total acting force Ftol is equal to Frep + Frett + Fvis. According to the processing method, the boundary control capability is effectively enhanced while the ULSPH advantages are reserved, and the numerical stability and physical accuracy of solid-liquid interaction in shell particle and fluid particle coupling simulation are improved.

The invention provides a whole-process simulation method and system for tunnel seepage and water and mud bursting, and the method comprises the steps: building a numerical model containing a tunnel and a fault, and building a solid particle and fluid particle system through meshless particles; a random fracture network is constructed and mapped to solid particles, and attributes are assigned according to fracture filling conditions; calculating particle interaction, introducing a seepage-stress coupling model into a fracture region, and dynamically updating seepage characteristics to simulate implicit seepage; judging damage and fracture of solid particles by using a preset criterion, and representing a cracked block by discrete element particles if the condition is met; calculating contact force between discrete element particles and contact force between discrete element particles and undamaged particles, and simulating movement of fractured rocks; bidirectional fluid-solid coupling is established, and whole-process simulation of seepage inoculation, rock mass fracture and water and mud bursting is achieved through time integration. According to the invention, the strong coupling process of rock mass fracture and large deformation fluid migration is seamlessly simulated through DEM-SPH coupling.

The invention provides a miscible multiphase fluid state prediction method and device, equipment and a medium, and the method comprises the steps: obtaining the state of a fluid system at the current moment, and obtaining at least one physical parameter used for controlling the dynamic evolution behavior of the fluid; according to the Newton's law of motion, calculating initial predicted values of the position and the speed of the fluid particles at the next moment; utilizing the trained multiphase fluid prediction network to predict the position correction of fluid particles and the volume fraction of each phase at the next moment; and obtaining the position and speed of the fluid particle at the next moment according to the position of the fluid particle at the current moment, the initial predicted value of the position and the position correction amount. Physical calculation and multiphase fluid prediction network correction are combined, and the network only needs to learn the deviation from physical basic motion, so that the learning difficulty is reduced, and the simulation process is more stable; and physical parameters are independently used as an input, so that the universality and the flexibility of the model are greatly enhanced.

A cloud fluid simulation method based on weak air particles and Lennard-Jones potential, comprising: step 1: layering space according to height, collecting data of each layering meteorological data affecting cloud fluid movement; step 2: analyzing different meteorological data; step 3: for each layering data, using Lennard-Jones potential to calculate the interaction force between gas particles, Lennard-Jones potential can calculate the influence of different forces between gas particles according to the distance between gas particles, to improve the original fluid particle calculation of Navier-Stokes equation, and can accelerate the operation with the help of GPU to accelerate the fluid particle calculation speed; step 4: for the movement change of particles caused by different atmospheric pressures when entering different layers, the concept of weak air particles is introduced, and the concept of two-phase flow is used to calculate the movement change of particles; step 5: using screen space particle rendering technology SSF to accelerate the rendering rate.

The application discloses a kind of space adaptive fluid simulation method based on smooth particle hydrodynamics, comprising: the three-dimensional model of boundary solid object is converted into SDF model;In simulation scene, import fluid particle set, SDF model and its gradient field;In single simulation time step, the scale function value of particle is calculated, while applying wake protection mechanism, the decay of scale function value of fine particle near boundary solid is delayed;The best scale of particle is calculated, whereby the particle is classified, and the scale of particle is adjusted according to the category of particle;The dynamics calculation of fluid particle is carried out, while processing the coupling of fluid particle and boundary solid, using time mixing scheme to stabilize numerical field, update the physical properties of particle and the physical properties of boundary solid.The scheme of the application can more effectively refine the coupling details of fluid and multiple dynamic boundary solid objects while improving the simulation efficiency, and effectively capture the complex dynamic behavior below fluid surface.

A vacuum cleaner and fluid separator includes a vortex generating device which generate forced vortex based on the Coanda effect. The generated vortex is the laminar swirling flow causing the fluid particles to be separated into layers. The fluid with bigger particles swirls at the outer layer, while the fluid with smaller particles swirls at the inner layer. The separator further includes stacked cones with a narrow space between the stacked cones to promote separation. The fluid separator further includes the reverse swirl facilitating cone to separate the fluid with bigger particles to be contained in the fluid storage chamber with bigger particles, and draw partial fluid swirling at the inner layer through the connection channel recycle back to the separation system. The vacuum cleaner further includes the preliminary separating section that separate big impurities out before the separation process for the fluid with smaller particles.

This invention relates to the field of multiphase fluid separation technology, specifically a multiphase fluid separation system based on a fractal distributor and a micro-cyclone matrix. The system includes: a fractal distribution module for distributing the flow rate of the multiphase fluid through a multi-level branching network; a cyclone matrix module for centrifugal separation via a series / parallel configuration of hydrocyclones and spiral separators; an intelligent control module for determining the control commands of the cyclone matrix module using a CFD physical model and an LSTM prediction model; and an adaptive feedback module for monitoring the fluid particle concentration in the actual separation product pipeline using an ultrasonic optical sensor array, and determining the corresponding response based on a comparison of the fluid particle concentration with a preset particle concentration threshold range. This system achieves highly uniform distribution of the multiphase fluid, effectively avoiding uneven flow and dead zones, and providing stable and consistent feeding conditions for subsequent cyclone separation.

This invention discloses a SPH (Self-Pulse Hydraulic Dynamics) simulation method for multi-buoy hydrodynamics during berthing operations of liquid cargo ships, comprising the following steps: S1, establishing a geometric model of a numerical tank; S2, establishing models of a first hull, a second hull, a first liquid tank, and a second liquid tank, determining the position of the liquid tanks inside the hull, merging the liquid tanks and the hull, importing the hull into the numerical tank, and adjusting its position within the tank; S3, setting the initial states and motion characteristics of the first and second hulls; S4, filling the first and second liquid tanks with fluid particles; S5, setting boundary conditions and wave generation modes; S6, setting mooring chains, wave damping, and typical parameters; S7, running the program to solve and outputting the calculation results. This invention simulates the coupling effect of the motion of two ships and the swaying of liquid tanks during multi-buoy hydrodynamic numerical tank operations under wave action by establishing a simulation technology for the multi-buoy hydrodynamics of a liquid cargo ship and its internal liquid tanks.

A system for manufacturing 3D objects, including at least one nozzle, configured to deliver at least one fluid component into a material receiving volume. The system further comprises a mechanism configured to deliver solid or high-viscosity fluid particles into the material receiving volume and a mechanism configured to reposition and shake the material receiving volume to remove gas inclusions trapped between the solid particles and fluid material components and to achieve a homogeneous distribution of particles within a polymer matrix.

The present disclosure provides a simulation method of hydraulic fracturing process and related equipment. Specifically, the simulation method comprises: constructing a rock mass model by using smoothed particle hydrodynamics based on rock mass mechanical parameters and fracture distribution of a target rock mass; the rock mass model comprises fluid particles, and the fluid particles are endowed with a preset water pressure; calculating characteristic parameters of particles of the rock mass model based on a partial differential equation of a preset seepage field, a preset control equation and a preset time parameter; wherein the characteristic parameters comprise position and velocity; the preset control equation comprises a plurality of control equations; and the plurality of control equations correspond to different types and states of particles. Such a technical solution combines smoothed particle hydrodynamics and seepage field to simulate the hydraulic fracturing process, and the conversion from continuous domain to discontinuous domain is realized under the SPH framework, which can significantly improve the calculation efficiency.

The invention belongs to the technical field of underwater operation equipment, and particularly provides a deep-sea mining vehicle plume treatment system which comprises a plume suction pipeline and a plume treatment integrated body, and the plume treatment integrated body comprises a plume suction pump, an electrochemical flocculation assembly and a cyclone; the electrochemical flocculation assembly comprises a sealed box body, a cathode and an anode; a fluid inlet is formed in the bottom of the sealed box body, and a fluid outlet is formed in the top; the input end of the plume suction pump is communicated with the plume collection main pipeline, and the output end of the plume suction pump is communicated with the fluid inlet; the fluid outlet is communicated with the inlet end of the cyclone, the floc outlet end of the cyclone is connected with a floc backfilling pipeline, and the overflow outlet end of the cyclone is connected with an overflow discharge pipeline. According to the plume treatment system for the deep-sea mining vehicle, chemical flocculants do not need to be added, and ecological safety is guaranteed; when micron-sized (the particle size is smaller than or equal to 15 microns) plume fluid particles can be treated, the plume treatment efficiency is remarkably improved.

This invention discloses a wave dynamics (SPH) simulation method for the coupling of liquid cargo ship motion and tank sloshing, comprising the following steps: S1, building a numerical wave tank model and setting boundaries; S2, establishing a hull model and a tank wall model, and setting the position of the tank walls inside the hull; S3, merging the imported hull model and tank wall model to generate a ship model containing the tank walls; S4, setting the ship model parameters and motion state; S5, filling and setting the properties of fluid particles in the tank; S6, setting the wave generation mode, wave damping, and typical parameters; S7, running the program to solve and outputting the calculation results. This invention uses a numerical wave tank simulation technique for liquid cargo ships with internal tanks to simulate the coupled response of ship motion and tank sloshing under wave action, achieving a two-way feedback between ship motion causing tank motion and the sloshing load of the fluid inside the tank affecting the ship motion.

A fluidic microsystem (100) for manipulating particles (1), (2), (3), for example biological cells, comprises a fluidic channel arrangement (10), which is designed to receive a flow of a fluid (4) with a flow direction S, in which fluid the particles (1), (2), (3) are arranged, and which contains, successively in the flow direction S, a first analysis section (11A), a first actuator section (12A) and a second analysis section (11B); a detector device (20) with a field of view (21A) which covers the first analysis section (11A) and the second analysis section (11B), wherein the detector device (20) is configured for radiation-based detection of at least one particle property of each of the particles (1), (2), (3) in the first analysis section (11A) and in the second analysis section (11B); and an actuator device (30) which is configured to subject each of the particles (1), (2), (3) in the first actuator section (12A) to a first actuator step, in particular comprising at least one of: executing a trigger action, taking a measurement and applying an actuating force. The fluidic channel arrangement (10) has a reversal section (13) having a first leg (13A), a reversal curve and a second leg (13B), wherein the first analysis section (11A) is arranged in the first leg (13A) and the second analysis section (11B) is arranged in the second leg (13B) adjacent to the first analysis section (11A) with respect to a direction transverse to the flow direction S. The invention also relates to a particle manipulation method for manipulating particles (1), (2), (3) in a fluidic microsystem.

Embodiments of the present application provide a fluid generation method, device, equipment and storage medium, which are applied to programmed modeling software, and the method comprises the following steps: in response to an import instruction of a preset curve and a cross-sectional object, generating a fluid particle group; a cross section of the cross-sectional object and a tangent direction of the preset curve are used to determine a particle form of the fluid particle group; a curve constraint force of the preset curve is obtained, and the particle form of the fluid particle group is constrained based on the curve constraint force, so as to determine a basic fluid form of the fluid; in response to an adjustment instruction of a form parameter of the basic fluid form, a target fluid form of the fluid is obtained. Through the preset curve and the cross-sectional object, the fluid along the preset curve and having a fixed form cross section is automatically generated, and through the adjustment ability of each form parameter, different fluid characteristics can be presented, so that the fluid with different forms can be quickly generated and debugged.

The application provides a fluid simulation method and system based on Taichi and Pytorch in the technical field of fluid simulation, and the method comprises the following steps: step S1, a fluid simulation algorithm based on the Taichi framework is used to generate a fluid dataset comprising a plurality of fluid motion trajectories; step S2, a fluid simulation model composed of a plurality of layers of perception mechanisms is built through Pytorch; step S3, each fluid motion trajectory in the fluid dataset is converted into a corresponding Torch tensor to obtain a tensor dataset, and the fluid simulation model is trained through the tensor dataset; step S4, an initial state of the fluid is obtained, the initial state of the fluid is input into the trained fluid simulation model for forward simulation to obtain a fluid particle position sequence; and step S5, the fluid particle position sequence is converted into a fluid model sequence, and the fluid model sequence is rendered into a fluid animation to complete fluid simulation. The application has the advantage that the fluid simulation precision is greatly improved.

The utility model relates to a kind of axial flow pump structure based on import prewhirl and impeller outlet without circulation quantity design, the structure includes: front guide vane, impeller, cylinder;Front guide vane is set on inlet horn pipe, front guide vane is set on the circumferentially uniform distribution of front guide vane blade, the outlet of impeller is directly connected on cylinder, and front guide vane is set on the circumferentially uniform distribution of 4~8 pieces of front guide vane blade.Front guide vane blade's installation angle α=15°~45°.The utility model's inlet horn pipe is set front guide vane, when high-speed fluid enters, because of guide vane, fluid particle produces orderly movement in radial and tangential direction, forms prewhirl, effectively optimizes the cavitation performance of axial flow pump.The utility model cancels the structure mode of traditional impeller guide vane matching, directly cancels the non-steady flow of guide vane and impeller Induced non-constant exciting force, while optimizing axial length, greatly reduce installation space and cost.

The invention discloses a fluid particle multi-material stirring and mixing simulation calculation method, and relates to the technical field of mixing simulation calculation, and the method comprises the following steps: S1, discretization and solution of a fluid control equation: the purpose is to accurately and stably simulate the dynamic behavior of a complex fluid in the stirring process; the method specifically comprises the steps of establishing a physical model, describing material characteristics, ensuring numerical feasibility, preventing numerical distortion and efficiently solving. Through combination of a non-Newtonian fluid model and an advanced numerical stabilization technology, the simulation problem of high-viscosity and non-linear flow is effectively solved, and the stirring dynamic behavior of complex fluid in the industry can be simulated with high precision; according to the method, quantitative mixing indexes suitable for various materials are innovatively introduced, quantitative evaluation can be carried out on the mixing state from macroscopic distribution to microcosmic uniformity, a clear and reliable basis is provided for process optimization, and the engineering guidance value of a simulation result is remarkably improved.

The application provides a kind of active swimming particle and droplet coupling dynamics simulation method and device, it is related to the technical field of multiphase flow numerical simulation, including: through the isothermal Newton fluid control equation of Lagrange form, based on fluid particle set, establish particle momentum equation;Through the speed assignment processing of each boundary particle on the surface of active swimming particle model, obtain boundary velocity condition, and according to fluid particle set, particle momentum equation and boundary velocity condition, the conservative force, dissipation force, random force, particle distribution correction force and interface force suffered by each particle are calculated to determine the total fluid force and total torque suffered by active swimming particle;Based on total fluid force and total torque, the state of fluid particle and the state of active swimming particle are updated, and the coupling dynamics simulation result is output after updating is completed.The application can significantly improve the coupling dynamics simulation accuracy of active swimming particle and droplet.