7 results about "Particle simulation" patented technology

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.

This invention discloses a simulation method for a finite-space gas leakage particle system based on velocity field pre-calculation, comprising the following steps: obtaining physical field pre-calculation results from finite element gas simulation software, the physical field pre-calculation results including non-uniform mesh data; homogenizing the non-uniform mesh data to obtain homogenized mesh data; performing coordinate axis transformation between the leakage source location and the simulation scene location; calculating velocity field data based on the homogenized mesh data, and driving the gas diffusion particles to perform motion simulation based on the velocity field data. This invention, by obtaining pre-calculation results through finite element gas simulation software, homogenizing the non-uniform mesh data, and calculating velocity field data based on the homogenized mesh data to drive the gas diffusion particle simulation, can effectively improve the current situation of gas simulation systems characterized by complex data processing algorithms, large computational load, poor simulation results when the mesh distribution is uneven, and poor data visualization.

This invention provides a method, apparatus, electronic device, and medium for determining contact force in particle motion simulation, belonging to the field of particle simulation. The method includes: acquiring a particle model to be simulated, the particle model including multiple nodes; performing surface reconstruction processing on the surface of the particle model to obtain a reconstructed surface; setting multiple background points on the reconstructed surface; for a target particle model, determining the contact force generated by other particle models on the target particle model based on the background points of the reconstructed surface of the target particle model and the nodes of other particle models; and performing particle motion simulation on the target particle model based on the contact force. This invention improves computational efficiency while ensuring the accuracy of particle simulation by performing surface reconstruction on the mesh surface of the particle model to obtain a smooth reconstructed surface, and then setting multiple background points on the reconstructed surface. The contact force is solved by the relationship between the background points and nodes.

This invention discloses a blowout prevention system and method for auger excavators based on SPH-DEM coupling, belonging to the field of tunnel engineering construction technology. The system integrates an SPH fluid simulation module, a DEM particle simulation module, a bidirectional coupling interface, a parametric model of the auger excavator, and a blowout early warning module. It uses the Lagrange particle method to discretize the fluid, Hertz-Mindlin theory to solve for particle contact forces, and GPU parallel computing to achieve bidirectional exchange of forces between the fluid and particles. It also integrates multiple key physical quantities to construct a blowout risk criterion. The method includes multi-scale model construction, coupling calculation parameter setting, bidirectional coupling calculation, blowout feature extraction, risk early warning, and parameter optimization steps. This invention simulates the particle migration and blowout mechanism caused by water pressure disturbance in water-rich strata, improving the accuracy of blowout risk identification and early warning capabilities, and providing a scientific basis for the structural design and construction parameter control of auger excavators.

Various embodiments can perform efficient, large scale fluid simulation using a method, such as the fluid-implicit particle (FLIP) method, over a sparse hierarchy of grids. The grids may be represented in a number of different formats, and may include GVDB Voxels. Such approaches can handle tens of millions of particles within a virtually unbounded simulation domain. Embodiments can utilize a parallel, sparse grid hierarchy construction and provide for fast incremental updates on graphics processing unit (GPU) hardware, for example, for moving particles. In addition, a FLIP-based technique can be used to perform sparse, work-efficient parallel data gathering from particle to voxel. Various embodiments can also utilize a matrix-free GPU-based conjugate gradient solver optimized for sparse grids. Such approaches can provide orders of magnitude faster simulations on GPU hardware with respect to conventional simulations.

The invention provides an ice generation method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring surface feature information of a target three-dimensional model; determining an ice growth area on the surface of the target three-dimensional model based on the surface feature information; generating a plurality of scattering point positions in the ice growth area; performing particle simulation based on the plurality of scattering point positions to generate ice particle data; an ice model is generated based on the ice particle data. According to the method provided by the invention, the suitable ice growth area is automatically identified by using the surface feature information, the problem of stiff distribution caused by only depending on single normal information is avoided, intelligent judgment of the ice growth area is realized, the manual division workload is reduced, and the interaction experience is improved.

The application provides an ALE-SPH particle migration simulation method based on WENO Riemann solution, and relates to the technical field of dynamic numerical simulation. First, the displacement migration speed of the moving particle is calculated based on the displacement state of the SPH particle. Then, the left and right states of the contact particle pair, including the migration speed, are high-precision WENO reconstructed based on the ALE-SPH framework. Then, the reconstructed left and right states are substituted into the newly proposed migration amount Riemann solver to calculate the Riemann solution of the migration speed. By introducing the particle migration mechanism based on the high-order reconstructed Riemann solution, the application can effectively alleviate the uneven distribution phenomenon in the particle simulation process, realize clear capture of the multi-medium interface, significantly reduce the numerical dissipation, improve the fidelity and stability of the numerical simulation under the high-speed impact and large deformation scene, and provide more reliable numerical support tools for the extreme dynamics process such as space debris protection and defense equipment design.