81 results about "Fluid simulation" patented technology

The invention relates to the technical field of energy utilization and computational fluid mechanics, in particular to a method for simulating flow and adsorption of fluid in biochar, which specifically comprises the following steps: acquiring a computed tomography grayscale image of the biochar, carrying out image binarization processing, generating a binarized image containing a matrix region and a pore region, and calculating the flow and adsorption of the fluid in the biochar according to the binarized image. Establishing a biochar pore geometric model; establishing a lattice Boltzmann adsorption model of charcoal convection diffusion coupling surface adsorption; and simulating the flow process and the surface adsorption process of the fluid in the biochar pore geometric model to obtain an adsorption kinetic model representing the flow diffusion rule of the fluid in the biochar pores and the adsorption rule in the biochar matrix. On the premise of improving the accuracy and the efficiency, the time and the cost required by actual experiments are reduced, and the problems of insufficient accuracy and low efficiency when the traditional image processing and fluid simulation technology is used for processing the large-particle-size biochar are solved.

The invention discloses a duplex plunger pump flow field simulation method for a spherical surface annular oil film, and the method employs the functions of volume extraction, mirroring and the like in SpaceClaim software to extract an internal drainage basin of a duplex plunger pump according to the working principle of the duplex axial plunger pump, greatly improves the model building efficiency, and improves the simulation precision of the duplex axial plunger pump. During modeling, a spherical annular oil film between a cylinder body and a valve plate is considered, ICEM software is proposed to carry out grid division on the spherical annular oil film, after a Nastran type grid file is exported, grid assembly is carried out in PumpLinx software, and reference is further provided for design and optimization of the plunger pump. The method comprises the following steps: 1, establishing a duplex plunger pump geometric model; step 2, establishing a duplex plunger pump drainage basin; step 3, carrying out mesh division on the drainage basin of the duplex plunger pump; step 4, establishing a drainage basin grid contact pair; 5, selecting a simulation model and setting corresponding parameters; 6, setting fluid simulation parameters; 7, simulation is started; and 8, analyzing a result.

The invention provides a method for solving a journal balance position of a radial sliding bearing of a dense-phase CO2 delivery pump, and the method comprises the steps: constructing an oil film model of the radial sliding bearing to be researched, and determining input parameters according to the oil film model; selecting and defining an inlet, a wall surface and an outlet of the oil film model so as to perform grid division on the oil film model; steady-state solution is selected in fluid simulation software, and material attributes, multiphase flow, a viscosity model, operation pressure, boundary conditions, a grid interface and a solution method are sequentially set; sequentially carrying out initialization and first calculation to obtain oil film pressure distribution when the journal is at the initial position; setting output parameters; a series of design points are generated in the response surface optimization experiment design module, and corresponding experiments are carried out; and generating a response surface based on an experimental result, and performing optimization according to the response surface to obtain the balance position of the journal. The method comprehensively considers the influence of factors such as viscous heating, viscosity-temperature effect and multiphase flow, is more consistent with the actual situation, and is high in calculation precision.

The invention discloses a hydrocyclone flow field simulation method based on an adaptive smoothed particle method, and the simulation method comprises the following steps: (1) determining structural parameters of a hydrocyclone, and constructing a geometric model of the hydrocyclone; (2) establishing a basic control equation, and discretizing the basic control equation into an adaptive smoothed particle normal equation; (3) setting boundary conditions and initial calculation parameters on the basis of the geometric model of the hydrocyclone, and then importing the boundary conditions and the initial calculation parameters into a fluid simulation scene for simulation; and (4) respectively monitoring the particle flow at the outlet of the underflow pipe of the hydrocyclone and the flow at the outlet of the overflow pipe, and stopping calculation after the flows at the two outlets are stable, thereby completing simulation. The flow field behavior in the hydrocyclone is simulated through the adaptive resolution smoothed particle method, the change and breakage of the interface in the hydrocyclone can be accurately captured, it is guaranteed that the change at the gas-liquid interface is clear and visible, the track of particles in the hydrocyclone is traceable, and the calculation amount and the calculation time are reduced through the adaptive resolution.

The invention discloses a natural gas transportation pipeline drag reduction structure, an optimization method and a system, and relates to the field of pipeline structures. The problems that groove drag reduction in the field of natural gas pipeline transportation aims at small-diameter pipelines, most grooves are in a traditional v shape, and the drag reduction effect is not remarkable enough are solved. The resistance reduction structure comprises a plurality of semicircular groove structures with alternate widths and widths; wherein the width of the wide groove is twice that of the narrow groove. The optimization method comprises the following steps: establishing a smooth pipeline and a model with a wide-narrow alternate semicircular groove on the wall surface; carrying out structured grid division on the smooth pipeline and the wall surface with the wide and narrow alternate semicircular grooves; numerical simulation is conducted through Fluent fluid simulation software, and a turbulent flow structure in the pipeline is obtained; and the drag reduction rate is calculated, and the final natural gas transportation pipeline drag reduction structure is determined according to the drag reduction rate. By reducing the resistance, the amount of conveyed gas can be increased under the same energy consumption, or the energy consumption is reduced under the condition of keeping the same flow, so that the overall conveying efficiency is improved.

The invention relates to the technical field of computers, and provides a fluid simulation method and device based on a Niagara particle system, and the method comprises the steps: creating a Niagara system in a simulation environment scene to be simulated; creating a particle emitter by using the grid 2D gas and / or the grid 3D gas in the fluid simulation plug-in as a fluid template so as to establish a fluid simulation space; dividing particles in the fluid simulation space into a plurality of distribution areas by adopting a space division algorithm, and associating the adjacent distribution areas; in the fluid simulation stage, neighborhood particles of each particle in the fluid simulation space are obtained according to the incidence relation between the particle distribution areas, and the motion state information of each particle and the interaction force between the particle and the adjacent particles are calculated. Updating the motion state information of the particles according to the motion trail and interaction of the particles and the time step, carrying out collision detection, and updating the motion state of the particles according to the result; and performing visual rendering according to the current motion state information and form information of the particles.

The invention provides a method and device for calculating shaking parameters of an irregular storage tank at a shallow liquid level, and the method comprises the steps: determining the boundary dimension and fluid simulation parameters of the irregular storage tank, the fluid simulation parameters comprise a liquid level, an overload parameter and a liquid density, and the ratio of the liquid level to the equivalent radius of the liquid level is smaller than or equal to 0.8; a simulation calculation model of the irregular storage tank is established based on the boundary dimension and the fluid simulation parameters, excitation of the initial speed is applied to the simulation calculation model, and VOF calculation is carried out to obtain a change curve of shaking force and a change curve of shaking torque; and identifying shaking parameters based on the change curve of the shaking force, the change curve of the shaking torque and the shaking equivalent model, wherein the shaking parameters comprise shaking frequency, shaking damping, shaking mass and shaking mass center position height. The invention provides a method and a device for calculating shaking parameters of an irregular storage tank at a shallow liquid level. The method and the device are used for solving the problem that the prior art is not suitable for calculating the shaking parameters of the irregular storage tank at the shallow liquid level.

The invention relates to the technical field of digital twinning, and discloses a digital twinning fluid simulation method, device, equipment and medium, which can obtain physical property information of a fluid to be simulated and size information of a fluid container; wherein the fluid to be simulated comprises at least one fluid. According to the physical property information of the to-be-simulated fluid and the size information of the fluid container, constructing a container model and a fluid model arranged in the container model in the digital twin system; wherein the fluid model comprises a first sub-model corresponding to each fluid. And setting a display attribute of each first sub-model in the initial fluid model to obtain a second sub-model corresponding to each first sub-model. And performing form control on each second sub-model according to the motion state parameter of each fluid, so that each second sub-model is dynamically displayed. According to the invention, digital twinborn simulation of fluids such as oil, gas and water can be realized, that is, virtual simulation of fluids such as oil, gas and water can be effectively realized.

The invention provides a 2D platform fluid simulation method and device based on a color channel, and relates to the field of fluid simulation. The method comprises the steps that the size of a grid and the size of a view space matrix corresponding to fluid to be rendered are obtained, and the size of the grid and the size of the view space matrix are determined according to a space area where the fluid to be rendered is located; constructing a view space matrix corresponding to the to-be-rendered fluid according to the size of the grid and the size of the view space matrix; traversing the view space matrix according to a preset sequence to obtain a grid state corresponding to each grid in the view space matrix; according to the view space matrix and the grid state corresponding to each grid, a liquid state sampling diagram corresponding to the to-be-rendered fluid is constructed, and the liquid state sampling diagram stores liquid information corresponding to each grid through an ARGB channel; obtaining a drawing state corresponding to the fluid to be rendered according to the liquid state sampling diagram and the ARGB channel corresponding to each grid; and according to the drawing state, determining a drawing mode corresponding to the to-be-rendered fluid, and according to the drawing mode, performing drawing operation on the to-be-rendered fluid. According to the method and the device, the problems of low fluid drawing capability and drawing efficiency under the condition of actually simulating liquid flow are solved.

The present invention provides a rendering method and device for applying fluid simulation results to virtual reality scenes. The method includes obtaining a wind flow field simulation result file for a building and its surrounding environment; establishing an initial point position model based on the building and the size of the scene to be rendered; searching for neighboring points for any initial point to generate a rendering data file readable by scene rendering software; using the rendered data file to perform particle modeling in the rendering software, coloring the particles according to wind speed, and automatically creating a particle motion animation according to time steps. The present invention processes the fluid simulation results in virtual simulation into a particle motion data source that drives the representation of wind trajectories in real-time scene rendering, combining virtual simulation with virtual reality to make virtual reality scenes more realistic and credible.

A digital 3D model of a component to be analyzed is obtained. The component includes regularly patterned holes. A first portion of the model is identified. The first portion includes the regularly patterned holes. A second portion of the model is identified. The second portion includes portions of the model that lack regularly patterned holes. A flow factor for the first portion is determined. The flow factor is indicative of flow characteristics of fluid flowing through the first portion with the regularly patterned holes. A numerical fluid simulation is performed using a mesh representing the geometry of the component. Performing the numerical fluid simulation includes modifying flow properties of the fluid simulation in the first portion based at least in part on the flow factor.

The application discloses a coating die flow field simulation analysis method and system, the method comprises the following steps: constructing a three-dimensional model of a coating quality control system, importing the three-dimensional model into a fluid simulation software, and extracting a fluid region through Boolean operation; segmenting and assigning regions to the extracted fluid domain; obtaining actual process parameters as boundary conditions, inputting the simulation model, dividing the grid of the fluid region, and calculating to obtain the flow field result; post-processing the flow field result to obtain the flow field simulation result, which at least includes the pressure difference distribution and the flow field velocity distribution in the slurry cavity; based on the flow field velocity distribution, determining whether the velocity difference between the center and the edge of the fluid domain exceeds the preset threshold value, if it exceeds, adjusting the coating die structure or the process parameters and re-simulating until the uniformity requirement is met; the application reduces the rectification cost, shortens the optimization cycle, and significantly improves the coating uniformity and the edge quality.

The invention provides a metal flow limiter with a pore plate structure and a rapid design method thereof, and the method comprises the steps: carrying out the flow-pressure difference test of a metal flow limiter without a superposed pore plate, fitting the test data into a flow velocity-original pressure difference relation curve, building a metal flow limiter fluid simulation model, and carrying out the finite element mesh division. The method comprises the following steps: setting fluid medium parameters, defining porous medium attributes, carrying out analogue simulation, repeating the previous steps on a metal flow limiter of a superposed pore plate, obtaining a corresponding data relationship between the pore diameter of the pore plate and the total pressure difference under fixed flow, defining an insufficient development factor theta to obtain a relational expression between the pore diameter and the insufficient development factor, and finally obtaining a relational expression including the flow, the total pressure difference and the pore diameter of the pore plate. The problems that in the prior art, a calculation model fails, design efficiency is low, and adaptability is poor are solved, the pore plate and the sintered filter element are combined to adapt to a wide flow range, the method is suitable for high-purity and high-pressure fluid flow limiting scenes, and remarkable economic and technical benefits are achieved.

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 invention discloses an audio frequency spectrum fluidization interaction presentation method and system based on shader computing power, and belongs to the technical field of image processing, and the method comprises the steps: obtaining an audio stream and user interaction data extraction features in real time; generating a sound interaction total dynamic field in the GPU parallel computing shader through nonlinear coupling; inputting the field into a preset neural network model in a fragment shader for forward reasoning to complete fluid neural physical evolution; separating an audio semantic layer in the rendering pipeline and executing competitive visual attribute mapping to generate an image; and performing asynchronous scheduling on each processing pipeline through an asynchronous calculation engine. According to the method, full-pipeline GPU calculation and neural operator evolution are adopted, the contradiction between fluid simulation and real-time rendering can be effectively solved, frequent data transmission is abandoned, low-delay interaction feedback is achieved while the physical reality sense is guaranteed, and the immersion sense and expressive force of audio visualization are remarkably improved.

The invention discloses an elevator abnormity early warning system and method based on low illumination enhancement and smog environment simulation, and aims to solve the problem of visual monitoring failure caused by low illumination of an elevator shaft, an encoder-decoder network is designed, and artifact-free image reconstruction is realized through a pyramid pooling module and a multi-scale data flow module; aiming at the defect that a smoke scene is difficult to physically simulate, a fluid dynamic method based on a divergence-free wavelet is provided, and smooth smoke dynamic data is generated by calculating a wavelet coefficient of a vector potential. The innovation point is that the wavelet space fluid simulation technology is applied to the elevator smoke early warning for the first time, and the end side low illumination enhancement algorithm is combined, so that the full-scene abnormity monitoring of the elevator shaft is realized. The system can detect smoke diffusion, passenger abnormal behaviors and mechanical faults in real time, and the elevator safety supervision efficiency is improved.

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 provides a leakage simulation method for an underwater production system, relates to the technical field of offshore oil engineering, and aims to realize leakage process simulation with a rapid and vivid visual effect. According to the method, a multi-dimensional parameter matrix is established, and a leakage data set is generated through high-precision simulation of fluid simulation software; then, designing an efficient algorithm in the virtual reality engine to realize quick loading of a simulation data set; after a user sets parameters, the system selects an upper group of data and a lower group of data closest to the parameters in the data set and performs interpolation calculation so as to generate simulation results matched with the actual parameters; then, utilizing a shader, a particle system, an illumination model and the like in a virtual reality engine to express the simulation result; according to the method, the simulation speed is increased, highly vivid underwater leakage scene performance is provided, and the method is suitable for risk assessment, emergency drilling and educational training of an underwater production system.

The embodiment of the invention discloses a fluid scene generation method and device, electronic equipment and a storage medium. The method comprises the steps that under the condition that scene description information input by a user is received, a fluid simulation scene and a main body shape model are generated according to the scene description information on the basis of a pre-trained large language model; inputting the fluid simulation scene and the main body shape model into preset simulation software to obtain a simulation result of the fluid scene; and displaying the simulation result through a preset interactive interface to complete the simulation process of the fluid scene. On the basis, the user only needs to input the scene description information, the fluid scene can be generated, the purpose of simulation is achieved, the user does not need to grasp fluid related knowledge, the threshold of fluid simulation is lowered, and the process of fluid simulation is simplified.

The invention belongs to the technical field of fluid simulation and scraper type film evaporator optimization, and particularly relates to a calculation method and application of theoretical torque of a rotor of a scraper type film evaporator. According to the theoretical torque splitting calculation method based on the power characteristics, the total power consumption of the scraper type film evaporator is split into viscous torque and liquid mass load torque, contribution mechanisms of different operation parameters to power are disclosed, the optimization direction is accurately positioned, and the association between the dynamic characteristics of a flow field and the power is determined; the theoretical moment splitting method provided by the invention realizes accurate quantification of power consumption, provides a theoretical basis and a systematic solution for energy-saving design of the scraper film evaporator, and has engineering application value.

The invention particularly relates to a two-stage fingertip sealing structure optimization method based on a Taguchi method, and belongs to the technical field of mechanical sealing. According to the method, the leakage rate, the inter-stage pressure difference rate and the highest temperature serve as optimization targets, six key structure parameters including the first-stage fingertip seal shoe height Xg1, the second-stage fingertip seal shoe height Xg2, the rear baffle height Hb1, the rear baffle height Hb2 and the fingertip sheet layer number N1 and N2 are selected as control factors, five levels are set for each factor, and an L25 (65) orthogonal test table containing 25 test combinations is constructed. FLUENT fluid simulation software is used for simulating each test combination, corresponding performance indexes are obtained, and through mean value analysis and variance analysis, a control factor which has the largest influence on each response target and an optimal level combination of the control factor are determined. The accuracy of the optimization result can be ensured, the optimization efficiency of the structural parameters is improved, and the result is accurate and reliable; the two-stage fingertip seal optimization design method based on the Taguchi method is adopted, and the sealing performance of the two-stage fingertip seal can be effectively improved; the test frequency is greatly reduced, and a large amount of test time and cost can be saved.

The invention provides a grid-based real-time fluid simulation special effect generation method and system, and relates to the technical field of computer graphics and computational fluid mechanics. On the basis of a fluid simulation algorithm, the fluid simulation special effect running on the GPU is achieved, fluid simulation is completely carried out in 2D, and compared with a traditional special effect implementation method, the method has the advantages that the operation rate is remarkably increased, and the requirement for the running rate of a mobile terminal product can be met; when the pressure item is solved, the number of iterations of the pressure item is reduced by using a separable Poisson solver, and the projection step of fluid simulation is accelerated; the three-dimensional appearance is achieved, different effects such as flame and trailing are achieved in combination with different mixing modes, and the overall visual effect is improved. The finally realized fluid simulation special effect can be widely applied to the fields of electronic games and the like; and finally, meeting the memory budget of the fluid simulation special effect by automatically updating the texture buffer area.

The application provides a controllable material removal viscoelastic medium abrasive design method, relates to the abrasive flow finishing process technical field, and is based on the material performance and size precision requirement of a target part processing surface, the processing allowance of a previous process, a preset extrusion pressure and a processing time length, the rheological property, the flow rate and the active abrasive particle concentration of the expected abrasive medium with an ideal processing efficiency generated by theoretical calculation of a material removal model, the flow behavior of the medium in a channel with different structure sizes through fluid simulation analysis, the channel structure size with uniform flow effect of the medium, the design of a matched clamp, the proportion relationship of each component in the abrasive medium determined by the rheological property and the active abrasive particle concentration, the controllable material removal viscoelastic abrasive medium, the precise and efficient finishing of a complex target structure, and the reduction of the dependence on personal experience in the design, the selection of the abrasive medium and the designation of the processing parameters.

The invention discloses a WebGL-based two-dimensional numerical wind tunnel fluid simulation and visualization system, and belongs to the technical field of fluid mechanics visualization teaching tools. The method comprises the following steps: acquiring fluid and obstacle related data through a user interaction module; the simulation calculation module runs on the cloud server, so that the calculation burden of a Web end is reduced; the simulation calculation module firstly takes the simulated wind speed as an initial velocity vector, then performs numerical simulation on the velocity field and the convection and diffusion process to simulate the evolution of actual fluid in the velocity field along with time, and sets the velocity vector in a grid where an obstacle is located to be 0 to ensure that the fluid cannot penetrate through the obstacle; correcting the intermediate velocity field to obtain a simulation velocity field so as to simulate a streaming phenomenon occurring after the fluid encounters an obstacle, and solving a simulation pressure field through divergence of the intermediate velocity field; and the visual rendering module displays the velocity field image and the pressure field image of the fluid in the WebGL according to the simulation velocity field data and the simulation pressure field data.

To provide a search method, search program, molded product, and manufacturing method that can obtain appropriate conditions in a short time. [Solution] The search method according to the present invention includes: a three-dimensional model creation step of creating a three-dimensional model based on design parameters; a simulation step of performing a fluid simulation using the three-dimensional model; a shape parameter extraction step of extracting shape parameters by image analysis; a convergence determination step of determining whether the difference based on the extracted shape parameters is below a convergence threshold; an update step of updating the design parameters by an optimization algorithm; a repeating step of performing the three-dimensional model creation step, simulation step, shape parameter extraction step and convergence determination step for the design parameters updated by the update step; and an output step of outputting the design parameters to be determined as optimal design parameters.

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.

The present application relates to a method and system for measuring the working performance of concrete based on a large multimodal visual model, which solves the problem of the relatively troublesome rapid detection of concrete working performance parameters. The method includes: based on the spatial semantic understanding capability of the large multimodal visual model, combined with multi-view stereo vision and structured light scanning technology, reconstructing the three-dimensional geometric structure of the concrete paste, extracting morphological characteristic parameters, and forming a feature vector; inputting the feature vector into a pre-trained multi-task neural network, fusing spatiotemporal features and combining with rheological algorithms to identify various working performance parameters; using ensemble learning to fuse at least three recognition results, and verifying the parameters based on the basic equations of fluid dynamics through a fluid simulation platform; based on the verification results, generating a mix ratio optimization suggestion including material components. The present application has the following effects: realizing non-contact rapid measurement of concrete working performance parameters, improving accuracy and efficiency, and providing mix ratio optimization suggestions.

The present invention discloses a non-Newtonian fluid simulation method and system for multiphase fluid, which belongs to the field of fluid simulation in computer graphics, including: modeling bone structure, including bone shape modeling and porous material modeling inside bone; modeling incompressible fluid based on smooth particle fluid dynamics; unified modeling of Newtonian fluid, shear thinning fluid and shear thickening fluid based on polymer conformation tensor method, and calculation of rheological properties of fluid; based on mixed model, constructing multiphase fluid simulation framework to support two-phase mixed modulation and multiphase fluid dynamics; exporting simulation data and reconstructing fluid surface according to fluid particles, using multiphase fluid rendering technology to render RGB pictures and make fluid animation. The present invention has stable process and realistic visualization effect, and can assist in medical teaching of bone cement surgery or help doctors evaluate the feasibility of surgical plans at low cost.

The present invention discloses a preprocessing method for thin plate hot stamping simulation water channel parameters, comprising the following steps: Step 1, establish a 3D fluid simulation model of the cooling water channel; Step 2, divide the 3D fluid simulation model of the cooling water channel into a straight pipe part and an elbow joint part; Step 3, for the straight pipe part; Step 4, for the elbow joint part; Step 5, determine and calculate the heat transfer coefficient of the water pipe; Step 6, group the water channel parameters: group the above-mentioned water pipe center line, water pipe diameter and water channel heat transfer coefficient; Step 7, use hot stamping simulation software to read the data after grouping to form a hot stamping simulation model; The present invention processes the cooling water pipes in sections, and calculates the water pipe diameter for each section according to the principle of equal volume; the difference in the water channel heat transfer coefficient of each part can be considered in the hot stamping die simulation model, and the influence of the water channel flow velocity difference on the hot stamping forming result can be simulated, improving the accuracy of hot stamping simulation.

The invention relates to a fluid simulation diagram generation method and device, equipment and a storage medium, and the method comprises the steps: obtaining a designated region, designated flowing time and designated flowing direction of a fluid flowing in an initial grid, and dividing the designated region into a plurality of grids; according to the scene information of the fluid simulation area, the expected height of the fluid in each grid is determined; constructing a height map according to the expected height of the fluid in each grid; according to the specified flowing time, the predicted time when the fluid reaches each grid is determined; constructing a thermodynamic diagram according to the predicted time when the fluid reaches each grid; determining the flowing direction of the fluid in each grid according to the specified flowing direction; according to the flowing direction of the fluid in each grid, a flowing direction diagram is constructed; and generating a flow simulation diagram of the fluid according to the height diagram, the thermodynamic diagram and the flow direction diagram. The simulation efficiency, accuracy and authenticity of the flow simulation diagram of the fluid are improved.