100 results about "Fluid particle" patented technology

The invention provides a smoothed particle fluid dynamics simulation wave impact structure boundary force processing method, which comprises the following steps: S1, initializing the speed, density and position of particles by establishing a numerical model; s2, dividing fluid particles and boundary particles; s3, calculating and correcting the density and speed variation of the particles according to the hydrodynamic equation and the boundary rejection effect; s4, calculating the pressure and the speed of boundary particles through a Schelerd interpolation method, and reflecting the interaction between the fluid and the solid; s5, based on the pressure and the position of the boundary particles, calculating the pressure intensity, obtaining the stress and the torque of the structure, and updating the degree of freedom; and S6, updating the particle state and entering the solution of the next time step. According to the method, when the influence of the boundary force is determined, the influence of the relative speed of fluid particles and wall surface particles is considered, meanwhile, the maximum speed in a flow field is approximately replaced by the artificial sound velocity, and the purposes of accurately simulating the interaction process of the ocean wave-ocean engineering structure and ensuring the stability of numerical simulation calculation are achieved.

The invention relates to the cross technical field of fluid mechanics and machine learning, and discloses a particle fluid two-phase flow simulation and reverse optimization method based on deep learning. The method comprises the following steps: constructing a two-phase flow coupling simulation framework based on a fusion discrete element method and smoothed particle fluid dynamics; the drag force, buoyancy and capillary force between particles and fluid are introduced, and the calculation efficiency is improved through GPU parallel acceleration; a graph neural network is adopted to establish a particle-level dynamic interaction modeling framework, and coding and prediction of solid particles and fluid particles are independently processed; a differentiable reverse design system is further developed, and layout parameters of a flow control structure are dynamically optimized based on a gradient descent method by combining automatic differential characteristics of GNN and surrounding target functions such as flow collapse degree and centroid offset, so that effective suppression of two-phase flow destructive behaviors and system performance optimization are realized. The method has high-precision simulation and efficient optimization capabilities, and is suitable for complex two-phase flow engineering scenes such as dam burst and debris flow prevention and control.

The invention relates to the technical field of mode recognition, in particular to a hydraulic engineering monitoring method and system based on water wave analysis, and the method comprises the following steps: based on a time sequence of a fluid particle motion trail, combining with the spatial change of a water flow velocity field, carrying out the difference calculation of the position and the velocity, and carrying out the superposition operation of fusing the curl and shear. According to the method, the local dynamic feature matrix is generated by combining entropy screening, and the local change capturing precision is improved. An overall dynamic feature matrix is generated based on convolution operation of time distribution and a position matrix, and the dynamic distribution and time correlation expression ability is enhanced. Efficient fusion of feature data sets is realized through sensitive weight distribution and distribution matching processing of eddy current distribution, and the accuracy of trend analysis is enhanced. A multi-scale dynamic rule is captured by using a rule matrix constructed by multi-frequency decomposition and a time window, dynamic trend prediction is completed by combining offset recursion extraction, and comprehensive analysis and high-precision prediction of water area changes are realized.

A substrate support includes a main body portion having a substrate supporting surface and a back surface opposite to the substrate supporting surface, the main body portion having a through-hole extending from the back surface to the substrate supporting surface, an upper porous plug and a lower porous plug disposed in the through-hole, at least one of the upper porous plug or the lower porous plug being detachable from the main body, and a plurality of fluid particles filling a space between the upper porous plug and the lower porous plug in the through-hole. Each of the plurality of fluid particles is formed of an Si-containing material or a resinous material and an Si-containing coating on the resinous material.

The invention provides a semi-analytical MPM-DEM coupling numerical simulation method for interaction of debris flow and a structure, and relates to the field of geotechnical engineering disaster simulation. Taking the fine-grain slurry as a continuous medium, and discretizing by adopting MPM; meanwhile, spherical particles and clustered particles serve as solid phases, and DEM modeling is adopted; structures and boundaries are embedded into the computational domain in the form of rigid walls. Through grid-particle information exchange and two-way transmission of particle-grid coupling force, synchronous solution of fluid-solid multiphase coupling is realized. The fluid-solid contact force adopts a semi-analysis mode; the DEM particles and the DEM particle-wall contact are accurately calculated on the basis of a Hertz-Mindlin model, and the DEM particle-wall contact is accurately calculated on the basis of a Hertz-Mindlin model. According to the method, collaborative collision, blockage and impact mechanisms of block stones and floating woods in debris flow are truly represented, and the three-dimensional large-scale situation of million-level fluid mass points and million-level particles is simulated. The simulation result can output key indexes such as the stress time history, the impact peak value and the blockage rate of the structure, and a reliable numerical basis is provided for debris flow protection.

The invention discloses an alloy directional solidification dendritic crystal front pore capture behavior prediction method comprising the following steps: obtaining data, and obtaining a CA-FD-LB coupling model; updating the distribution state of fluid particles in the grid in real time, and marking or updating the gas phase according to the distribution state of the particles in the grid; the temperature gradient and the cooling speed are initialized, and meanwhile the temperature of the whole calculation area changes along with time; obtaining a liquid phase equilibrium component at a solid / liquid interface and a solid phase fraction increment of a solid / liquid grid in a time step, marking solid phase distribution in a calculation area, and calculating a concentration field and solute redistribution; calculating the fluid-solid interaction between the bubbles and the solid phase; judging whether a calculation ending condition is met or not, if yes, ending calculation, and performing data visualization processing; otherwise, returning to the step 2, and starting calculation of the next time step. According to the method, the microscopic structure evolution process can be observed in real time while the calculation efficiency is high, and information is quantified.

The application discloses a metallogenic fluid main channel inference model based on particle filtering. The model comprises the following steps: collecting relevant data of a target deposit, establishing an inference database, and defining a state sequence of spatial discrete elements; performing statistics on ore-bearing elements known in all exploration information, taking the known ore-bearing elements as an initial particle group of particle filtering, and generating a spatial channel path of each particle; establishing a metallogenic fluid ion state transfer model coupled with probability and velocity according to the spatial position of the particle and fluid dynamics; establishing a particle weight observation model based on a particle state transfer likelihood function, and dynamically updating the weight of the fluid particle; performing spatial sampling on the particle through a resampling algorithm, updating the weight particle, and outputting a maximum posterior probability path through particle number threshold judgment. The model combines multivariate data constraint and particle filtering algorithm to dynamically estimate the main channel path of the metallogenic fluid in a three-dimensional geological space, and fundamentally solves the problems of high cost and difficult sampling sample acquisition of the traditional method.

The application discloses a bridge scour simulation and boundary setting method for SPH water-sand two-phase flow, and comprises the following steps: model construction, including setting a bed sand layer area range and defining an inlet and outlet boundary area range; particle construction, including setting fluid particles and bed sand particles of a flow field area based on a multiphase flow theory, setting soil yield strength based on a HBP model and introducing a DP yield criterion, initializing inlet and outlet boundary particle parameters, setting particle type identification, and setting particle position identification; N-S control equation solving, obtaining corresponding flow force parameter results; entering a sediment solving module, including sediment particle conversion and viscosity updating calculation; entering an inlet and outlet boundary updating module, including inlet and outlet particle position retrieval, particle type conversion, and particle supplement and deletion; completing a calculation cycle and entering the next cycle; through secondary development based on the SPH multiphase flow theory, the application can realize numerical simulation of foundation local scour by applying the inlet and outlet boundaries to the multiphase flow model and introducing various structure and state models.

The invention discloses a slender beam fluid-solid coupling analysis method and device based on a finite mass point method and SPH. A structure is dispersed into beam mass points, a slender beam is simulated through a two-dimensional beam unit, fluid is simulated through SPH particles, coupling interface pressure transmission is simulated through a transmission unit, and coupling interface displacement coordination is simulated through a coupling unit. A finite mass point method is adopted for dynamic analysis, pure deformation and rigid body displacement of the two-dimensional beam unit are separated through virtual reverse motion, and then the internal force increment of the plane beam unit is calculated; an SPH calculation fluid model is adopted, and a discrete format of a fluid control equation, a tensile stability control method based on a Shepard Filter and a particle displacement correction technology and a leapfrog time integration scheme are given; an FPM-SPH interface coupling scheme is provided, a coupling interface particle arrangement method is given, a physical quantity corresponding relation between beam particles and fluid particles at an interface is established, and a two-dimensional beam fluid-solid coupling analysis framework is established. The method is simple and efficient in calculation, and overcomes the defects of existing research.

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 present invention discloses a method for simulating weakly compressible fluid smooth particles based on particle position correction, comprising the following steps: 1. Smooth particle modeling of weakly compressible fluid; 2. Smooth particle position correction; 3. Using a computer to input the corrected position vector of the i-th particle, and using a position-based Verlet algorithm to perform time iteration on each particle in the SPH particle model to obtain an updated particle flow field distribution; and 4. Obtaining fluid state parameters from the updated particle flow field distribution. The method of the present invention has simple steps and a reasonable design. By correcting the position of fluid particles, a uniform distribution of simulated particles is achieved without introducing physical parameters, resulting in better applicability to complex flows and improved stability and accuracy of subsequent simulation calculations.

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.

The invention relates to the technical field of computational fluid mechanics, in particular to a method for simulating the freezing process of a liquid drop impacting a cold surface. According to the specific technical scheme, migration calculation is conducted through an obtained distribution function; according to the mass distribution function and the energy distribution function, calculating a macroscopic physical quantity in the flow field, and calculating the pressure intensity and the pseudo potential energy of the fluid; the pseudo potential energy of the virtual fluid is calculated, and the interaction force between fluid particles and the interaction force between the fluid particles and the solid wall surface are calculated; calculating a real macroscopic velocity, an enthalpy value and a solid-phase volume fraction of the fluid, and a collision term, an acting force source phase and a heat source term of a distribution function; performing collision calculation on the mass distribution function and the energy distribution function, judging whether a convergence condition or a preset number of iterations is reached, and outputting a calculation result if the convergence condition or the preset number of iterations is reached; otherwise, continuing to execute the iteration process. According to the invention, a means can be provided for exploring freezing characteristics and mechanisms of impact of tiny liquid drops on a low-temperature surface, and a thought is provided for design and development of an anti-icing surface.

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 present application relates to a semiconductor bulk gas particle detection device and method, belonging to the field of fluid particle detection technology, the semiconductor bulk gas particle detection device includes a circulation pool, the circulation pool is provided with a channel for passing through the detection hole, the circulation pool is provided with an input pipe, the input pipe is connected with the entrance of the channel, a rotating rod is rotatably provided in the input pipe, the rotation axis of the rotating rod is perpendicular to the length direction of the input pipe, the rotating rod is provided with a plurality of blades at intervals along its own circumference, the blades are provided with a plurality of first through holes and a plurality of second through holes, the blades are provided with an adjustment mechanism, the adjustment mechanism is used to adjust the first through hole to close the second through hole when it is opened or to adjust the second through hole to close the first through hole when it is opened. The present application has the effect of making it difficult for particles in the fluid to aggregate, improving the dispersion of particles, and ensuring the accuracy of particle detection to a certain extent.

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.

The invention relates to the technical field of fluid-solid coupling calculation, and provides a fluid-solid coupling calculation method, device and method based on MPS-PD, and the method comprises the steps: respectively generating initial particles in fluid and solid initial regions according to a fluid-solid coupling problem, and endowing the particles with corresponding physical quantities and initial conditions; dividing a particle region, and associating other particles in the influence region; mPS calculation is carried out on all the particles at the same time, and the acceleration of the fluid particles in the next time step is solved; carrying out PD calculation on the solid particles to obtain the acceleration of the solid particles at the next moment; updating the speed and displacement of the next particle according to the obtained accelerations of the two particles; and checking whether an overflow calculation region exists between the particles and whether the calculation time exceeds the total time, and performing calculation of the next time step until a stop condition is met. According to the method, the MPS method and the PD method are combined for application, the advantages of the two methods in fluid and solid are exerted, and the accuracy of fluid-solid coupling calculation is improved.

The present disclosure provides a dynamic fluid effect processing method and device, electronic equipment and readable medium, and relates to the technical field of computers. The method comprises: displaying a first object and a fluid in a user display interface; obtaining the position of each model particle in the object model corresponding to the first object; obtaining the position of each fluid particle corresponding to the fluid; when the first object collides with the fluid, for each fluid particle, adjusting the position of the fluid particle according to the position of the model particle colliding with the fluid particle, to dynamically display the motion change of the fluid in the user display interface. The technical scheme provided by the present disclosure adjusts the position of the fluid particle according to the position of the model particle colliding with the fluid particle when the first object collides with the fluid, without calculating the SDF of the first object, simplifying the calculation process and being able to present the motion change effect of the fluid in real time on a mobile terminal.

A high-precision interface processing method suitable for a multi-resolution particle method, the processing method comprising the following steps: measuring the physical parameters of a flow field and a fluid; setting the initial distribution of particles; determining the range of high- and low-precision regions and clarifying interface information; setting virtual grids on both sides of the interface; calculating fluid flow using the virtual grids and fluid particle information to obtain corresponding calculation results; and correcting particle velocity and particle position according to the obtained calculation results.

The present invention belongs to the field of artificial intelligence technology, and relates to a method and device for simulating external force-driven scene flow based on SPH of CCNN. The method comprises: transforming the smooth particle dynamics time advancement format, and using a continuous convolution neural network to correct the displacement of fluid particles in the transformed time advancement format; using a classical smooth particle dynamics method to simulate the scene flow driven by external force, and generating a plurality of data sets of flow field velocity evolution over time as a training set; using the training set to train the continuous convolution neural network; according to the time advancement format of the transformed smooth particle dynamics model, updating the position and velocity of the fluid particles, and simulating a given external force-driven scene flow. The technical solution of the present invention simplifies the acceleration term in the time advancement format, increases the time advancement step, and improves the efficiency of numerical simulation of scene flow driven by external force, and can quickly simulate the flow of fluids with different viscosities under different external forces and scenes.

To provide a simulator allowed to suppress the lowering in accuracy of simulation even where an object has a curved surface.SOLUTION: A simulator comprises: an input section that inputs a simulation condition including information representative of a shape and position of an object arranged in an analysis space and fluid flowing in the analysis space and initial and boundary conditions; a processing section that defines a plurality of secondary curved-surface elements to reproduce a surface of the object, arranges a plurality of fluid particles representative of the fluid in the analysis space and calculates the shortest distance from respective ones of the plurality of fluid particles to the secondary curved-surface elements and furthermore calculates, on the respective ones of the plurality of fluid particles, a force to undergo from the surface of the object based on a calculation value of the shortest distance and determines a behavior of the plurality of fluid particles based on the force calculated; and an output section that information reflecting the behavior of the plurality of fluid particles is outputted.SELECTED DRAWING: Figure 7

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 utility model relates to a gas flow particulate pollutant detector. When the concentration of solid particulate matters in gas is measured in the prior art, as the particulate matters sink under the action of gravity, the measured numerical value of particulate pollutants has errors. A mixing pipe section (1) is located at the gas inlet end of the gas fluid particle pollutant detector, the mixing pipe section (1), a detection pipe section (3) and a pressure reduction pipe section (4) are sequentially connected, and a detection probe (2) is inserted into the detection pipe section (3) through a detection element (2A); a group of turbulent flow blades (1B) of the mixing pipe section (1) are uniformly distributed in the circumferential direction of the cylinder wall of the mixing pipe cylinder (1A), each turbulent flow blade (1B) is rotationally mounted on the inner wall of the mixing pipe cylinder (1A), and the angle of the plane where the blade surface of each turbulent flow blade (1B) is located is the same as the included angle between the plane where the cross section of the mixing pipe section (1) is located and is 20-70 degrees. According to the utility model, the detection precision is improved by uniformly stirring particles in the gas to be detected and the gas.

The invention relates to the technical field of multi-phase fluid separation, in particular to a multi-phase fluid separation system based on a fractal distributor and a micro cyclone matrix, which comprises a fractal distribution module for distributing the flow of a multi-phase fluid through a multi-stage branch network; the rotational flow matrix module is used for carrying out centrifugal separation treatment through serial / parallel arrangement between a hydrocyclone and a spiral separator; the intelligent regulation and control module is used for determining a control instruction of the rotational flow matrix module through a CFD physical model and an LSTM prediction model; and the self-adaptive feedback module is used for monitoring the fluid particle concentration of an actual separation product pipeline through the ultrasonic optical sensor array, and determining a corresponding response result according to a comparison result of the fluid particle concentration and a preset particle concentration threshold range. According to the multi-phase fluid distributor, highly uniform distribution of multi-phase fluid can be realized, uneven flow and formation of a dead zone are effectively avoided, and stable and consistent feeding conditions are provided for subsequent cyclone separation.

The invention provides a refrigerating fluid and a preparation method thereof, and a freezing method of meat products, and relates to the technical field of preservation methods of meat products, the refrigerating fluid comprises 10% (w / v) of food-grade sodium acetate, 4% (w / v) of food-grade sodium lactate, 5% (w / v) of pharmaceutical-grade propylene glycol, 2% (w / v) of sodium dehydroacetate, 1% (w / v) of sodium tin citrate, 0.5% (w / v) of natural bioactive antibacterial peptide, 3% (w / v) of food-grade potassium acetate, and RO ultrapure water: 100%. Comprising the following steps: S1, adding RO ultrapure water into a container, and gradually adding required components under a stirring condition; and S2, adjusting the pH value of the solution to 4.0-5.5. According to the refrigerating fluid, the preparation method thereof and the refrigerating method of the meat product, refrigerating fluid particles are uniformly distributed and cover the surface of the meat product without dead angles; and in cooperation with multiple innovative means such as ultralow-temperature quick freezing and layered freezing, ice crystal control and microcapsule inhibitor release, the cooling rate can be accurately controlled in each freezing stage.

The present invention relates to the field of numerical simulation technology, and specifically discloses a method for calculating motor power taking into account changes in the state of liquid solidified soil mixing, comprising the following steps: first determining the liquid viscosity curve of the liquid solidified soil under different mixing states; then constructing the particle motion control equation of the moving particle semi-implicit method MPS; calculating the particle number density; discretizing the particle motion control equation, and calculating the pressure of the fluid particles under different viscosity conditions; establishing an MPS model for liquid solidified soil mixing, monitoring the pressure of the liquid solidified soil particles acting on the solid particles on the mixing blades, and calculating the force of the liquid solidified soil particles on the solid particles of the blades and the torque of the mixing shaft; obtaining the working torque of the motor through the calculation formula of torque and force, and finally obtaining the motor power. The present invention adopts the above-mentioned method for calculating motor power taking into account changes in the state of liquid solidified soil mixing, which can achieve efficient matching between the mixing state of fluid solidified soil and the change in the power of the mixing motor.

The present invention relates to the technical field of computational fluid dynamics, and specifically to a method for simulating the freezing process of a droplet impacting a cold surface. The specific technical solution is: using the obtained distribution function to perform migration calculations; calculating the macroscopic physical quantities in the flow field based on the mass distribution function and the energy distribution function, and calculating the pressure and pseudo-potential energy of the fluid; calculating the pseudo-potential energy of the virtual fluid, and calculating the interaction forces between fluid particles and the interaction forces between fluid particles and solid walls; calculating the real macroscopic velocity, enthalpy value and solid phase volume fraction of the fluid, the collision term of the distribution function, the force source phase, and the heat source term; performing collision calculations on the mass distribution function and the energy distribution function, and judging whether the convergence condition or the preset number of iterations is met, and outputting the calculation results if it is met; otherwise, continuing the iterative process. The present invention can provide a means for exploring the freezing characteristics and mechanisms of tiny droplets impacting low-temperature surfaces, and provide ideas for the design and development of anti-icing surfaces.

The invention relates to a mobile particle semi-implicit simulation method for dam break-floating body interaction. The method comprises the following steps: establishing a computational domain model, dividing a computational domain through particles, defining a plurality of particle types, and setting initial conditions and motion attributes of a floating body; establishing a neighbor particle set, and calculating the particle number density of each particle; constructing a secondary free surface, and judging the free surface by using the judgment model; establishing threshold type particles, and standardizing the distribution of fluid particles far away from a free surface by using a migration model; estimating the middle movement speed and the middle displacement of the fluid particles, and calculating the displacement of gate particles; constructing a calculation model for solving the pressure of the flow field, and solving the total pressure by adopting a Gaussian iteration method; fluid force and torque borne by the floating body are calculated, and the speed and displacement of the floating body are calculated; and calculating the gradient of the flow field pressure, and updating and exporting the speed and displacement of the fluid particles to obtain the updated speed and updated displacement of the fluid particles.

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.