56 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 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 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 application relates to a kind of stretch stable SPH fluid simulation method, can effectively weaken stretch instability problem in SPH fluid simulation process.The present application introduces two new particles in SPH fluid simulation process, namely: as the sampling point of pressure field virtual particle, and with speed attribute and carry fluid mass real particle, and based on these two particles, it is constructed based on the projection method of SPH fluid simulation technology method.In addition, the present application provides two virtual particle generation methods, to efficiently generate virtual particles without increasing too much computing expense.The present application can effectively weaken stretch instability problem in the original SPH fluid simulation method, significantly improve the stability, visual quality and accuracy of fluid simulation.The present application not only can simulate the form of fluid in stretch state, such as thin layer, fine stream, splash and droplet, but also can realize the stable simulation of incoherent fluid.

The invention discloses a mobile terminal rendering method based on LBM-VOF fluid simulation and ray tracing. The method comprises the following steps: receiving input parameters and scenes of fluid simulation; on the basis of a Vulkan calculation pipeline, an LBM model is used for being coupled with a VOF interface capture algorithm, and the fluid density, speed and filling level are updated; executing ray tracing rendering calculation by using a GPU and a calculation pipeline, performing surface reconstruction by using a marching cube algorithm, calculating a mixed color through reflection, refraction and ray absorption, and generating a low-resolution rendering image; performing up-sampling on the low-resolution rendering image, and reconstructing the low-resolution rendering image into a high-resolution rendering output image; and integrating the rendering logic to a mobile terminal application by means of a mobile terminal application development library GameActivity, and finally presenting a fluid rendering result on a mobile terminal screen. According to the invention, integration of fluid simulation and a real rendering technology is realized, and the system is transplanted to a mobile terminal to realize a realistic fluid rendering effect.

The invention discloses a gas turbine key component data visualization method and device, and relates to the technical field of data-driven three-dimensional visualization models.The method comprises the steps that on the basis of basic data, FLUENT fluid simulation software is used for conducting analog simulation on flowing fluid in a key component area, and a vector field file is generated; in a Niagara particle system of a vector field file unreal engine, particle control data is determined by utilizing a speed intensity control equation according to the positions and detection data of a plurality of key points in key components, and particle state control is completed; and performing visual rendering on the particles in the key component area, and dynamically adjusting the virtual display effect of the key component area. According to the method, the flowing fluid in the key component area is simulated, so that the data visualization of the key component of the gas turbine is realized, and the actual state change in the key component is intuitively and accurately displayed.

The invention discloses a particle driving fluid simulation and rendering method of a mobile phone terminal. The method comprises the following steps: initializing dynamic attributes such as position, speed and quality of fluid particles; adopting a particle position-based dynamic prediction and update algorithm, and combining position constraints to carry out parallel iterative simulation; the calculation overhead is effectively reduced by utilizing shader parallel calculation and mobile terminal hardware acceleration characteristics; a mobile terminal fluid rendering pipeline is adopted, and rendering calculation is optimized through screen space fluid rendering and a physical coloring model; the fluid behavior is controlled in an interaction mode that the mobile terminal touches the screen. Compared with the prior art, the method has the advantages that higher frame rate, lower calculation overhead and realistic rendering effect are realized at the mobile terminal, and the method is suitable for real-time fluid simulation and interaction application of mobile terminals such as smart phones.

The invention discloses a line segment merging-based multistage grid orthogonal slice drawing method, which comprises the following steps of: preprocessing a multistage grid, and disassembling a unit to form a surface patch; classifying the surface patches formed after disassembly into orthogonal tangent planes possibly generated in different axial directions; further disassembling the surface patches in different axial directions into cutting edges generated under an orthogonal tangent plane; polymerizing the cut edge to form a polymerized edge; and rendering the aggregated edge. According to the method, the data is quickly positioned by establishing the orthogonal tangent plane index, and line segment aggregation and multi-thread parallel computing are combined, so that on the premise of ensuring the drawing precision, the amount of data for calculation and drawing is remarkably reduced, the resource occupation is reduced, the problems that in the prior art, the multi-level grid slice drawing efficiency is low and real-time interaction is difficult to meet under complex cases are solved, and the method is suitable for large-scale popularization and application. The method is suitable for fluid simulation and other scenes needing high-frequency display of multistage grid orthogonal slices.

The present invention belongs to the technical field of 3D modeling, and provides a 3D model design method, system, storage medium and device based on fluid simulation. Among them, the method includes converting 3D model parameters into fluid simulation parameters, and then simulating the corresponding fluid particle state information based on the initial parameters of the fluid simulation system; sequentially performing hole filling and surface reconstruction based on the fluid particle state information to obtain a corresponding fluid model; screening out the fluid models meeting preset requirements to obtain corresponding 3D models for 3D printing.

The invention discloses a music driving fluid generation method and system based on multi-dimensional semantic mapping, and belongs to the technical field of computer graphics and audio signal processing. The method comprises the following steps that music input by a user is received, characteristics such as rhythm, frequency spectrum and energy are obtained through audio analysis, and emotion vectors and color information changing along with time are obtained through a music emotion recognition and color palette generation module; in a unified parameter space, the audio, emotion and color semantics are mapped into fluid colors, fluid simulation parameters and camera and environment control parameters, and fluid models such as shallow water waves or height fields are driven to generate multi-style fluid scenes changing along with music. Compared with an existing music visualization mode which only depends on frequency band energy to drive simple and special effects, the method can achieve consistent expression of music emotion, rhythm, fluid form and audio-visual atmosphere in multiple scenes, and can be applied to scenes such as music visualization, immersive interactive art display and emotion relaxation assistance.

The invention provides a water restraint layer applying method and system for complex profile in-situ laser shock peening, the system is mainly composed of a water producing device, a water guiding device, an adjusting device, a moving device and a monitoring device, and a water nozzle installed at the tail end of the water guiding device can be rapidly replaced. The water confinement layer applying method comprises the following steps: establishing a water confinement layer fluid simulation model of each characteristic part of a complex molded surface; analyzing and optimizing to obtain the water nozzle shape, size, position and water pressure parameters of each characteristic part of the complex molded surface; a water nozzle is manufactured through 3D printing; application of a water restraint layer in the complex profile position in-situ laser shock peening process is achieved through a multi-joint robot arm; an optical water film thickness measuring system is adopted to monitor the water film thickness in real time and adjust the water pressure in real time. By means of the method, rapid and accurate application of the in-situ moving beam laser shock peening water restraint layer on the complex profile can be achieved, and the batch laser shock peening machining efficiency and quality are greatly improved.

The invention provides a large-scale biological cluster simulation method in a live-action three-dimensional model based on oblique photography, and the method comprises the steps: constructing a live-action three-dimensional scene, carrying out the ground object separation, taking the separated movable object and crowd as fluid, and carrying out the volume discretization of the fluid into particles with physical attributes according to the volume, thereby achieving the simulation of the large-scale biological cluster in the live-action three-dimensional model. And acquiring a fluid force field, endowing the immobile model and the individual with different motion postures according to particle force field information in fluid force field information, planning a global path of a group, and selecting different local driving strategies to carry out real-time dynamic microscopic correction on the advancing direction of the individual on the advancing path so as to realize large-scale cluster biological simulation. According to the invention, multiple types of fluids are bidirectionally fused, so that each individual can still keep independent main power under the influence of a group, and the diversity of the individuals is kept.

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.

The invention discloses a wind tunnel airflow realistic rendering method based on a lattice Boltzmann method distribution function, and relates to the technical field of computer graphics and fluid simulation visualization, and the method comprises the steps: directly taking nineteen direction distribution functions of LBM simulation as a smog density transmission carrier, building a triangulation convex hull space mapping relation of a D3Q19 direction vector, and carrying out the transformation of the smog density; sub-grid precision mapping from a velocity vector to a discrete direction is realized through ray-triangle intersection, and the smoke density is distributed to a target grid based on a direction weight. Distribution functions in nineteen directions are obtained through LBM simulation, and the data are directly used as transmission carriers of smoke density. And then, accurately mapping a velocity vector to a discrete direction by using the established triangularization convex hull space mapping relation of the D3Q19 direction vector. Through intersection detection of rays and triangles, sub-grid precision mapping from a velocity vector to a discrete direction is realized, and the rendering precision and authenticity are improved.

1. Name of the product in this design: Pendant (Fluid Simulation). 2. Purpose of this design: This design is intended for use as a decorative pendant on backpacks, keychains, etc. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The present invention discloses a fluid simulation method for complex structures, comprising the following steps: converting the complex structure into a polyhedron model composed of triangular face units; determining the positional relationship between the polyhedron model and a rectangular grid; re-dividing the intersecting body into a new polyhedron composed of triangular face units, and obtaining the external normal directions of all triangular face units; projecting all triangular face units onto one face of the rectangular grid; projecting the triangular face units onto the bottom surface of the grid, where the projected body is a pentahedron, and summing the volumes of the pentahedrons obtained by projecting all the triangular face units to obtain the volume of the intersecting body. The method of the present invention is used to solve the problem of how to accurately and efficiently solve the volume of the intersecting body when a complex structure intersects with a rectangular grid, and can significantly improve the calculation efficiency while ensuring the calculation accuracy.

The invention provides a fluid simulation optimization method and system for a siphon structure of a water-saving closestool. According to the method, a three-dimensional flow field model is constructed by collecting pressure mutation data of a liquid-gas interface of a flow guide cavity of the closestool and vortex intensity data of a spiral area and combining the shrinkage rate characteristics of a trapezoidal cross section; iteratively adjusting a pressure gradient parameter based on a shrinkage rate parameter in the model, so that the flow velocity distribution of the simulation flow field is dynamically matched with the pressure field, and optimizing a pressure gradient balance negative pressure peak value according to the energy loss difference of the pipe section intersection and vortex intensity data; the inclination angles and the distances of the virtual blades are adjusted in an automatic linkage mode through vortex intensity feedback; verifying an inclination angle effect of a drain outlet by combining a water storage boundary, and establishing a positive correlation function of a negative pressure peak value and siphon time; and finally, integrating the collaborative parameter set, dynamically calibrating a negative pressure peak interval under a low water pressure working condition, and realizing closed-loop control of water saving and fluid kinetic energy conversion. According to the application, negative pressure peak value stable control and water-saving efficiency cooperative improvement in the siphon process are realized.

The application discloses a kind of based on theoretical calculation and fluid simulation radial static pressure spindle performance optimization design method, comprising the following steps: S1, establish the physical model of radial gas static pressure spindle gas film, and define gas film geometric parameter, throttling mode, load and boundary condition;S2, in combination with gas lubrication theory, based on Navier-Stokes equation and Reynolds equation mathematical model for describing radial static pressure spindle gas film pressure field and load capacity is established, and according to mathematical model calculation obtains theoretical pressure field and theoretical load capacity;S3, establish three-dimensional computational fluid dynamics simulation model and carry out simulation calculation, obtain simulation pressure field and simulation load capacity;S4, theoretical pressure field and theoretical load capacity are compared with simulation pressure field and simulation load capacity respectively, based on comparison result, correct mathematical model.The application innovatively combines theoretical calculation and CFD simulation calculation, solves the problem of low parameter matching efficiency and insufficient dynamic stability in traditional design.