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    Computer simulation of physical fluids on irregular spatial grids stabilized for explicit numerical diffusion problems
    1.
    发明授权
    Computer simulation of physical fluids on irregular spatial grids stabilized for explicit numerical diffusion problems 有权

    公开(公告)号：US11645433B2

    公开(公告)日：2023-05-09

    申请号：US16686514

    申请日：2019-11-18

    Applicant: Dassault Systemes Simulia Corp.

    Inventor： Nagendra Krishnamurthy ,  Luca D'Alessio ,  Raoyang Zhang ,  Hudong Chen

    IPC: G06F30/20 ,  G06F111/10

    CPC classification number: G06F30/20 ,  G06F2111/10

    Abstract: Computer implemented techniques for simulating a fluid flow about a surface of a solid are disclosed. These techniques involve receiving a model of a simulation space including a lattice structure represented as a collection of voxels and a representation of a physical object, with the voxels having appropriate resolutions to account for surfaces of the physical object. The techniques also involve simulating movement of particles in a volume of fluid, with the movement of the particles causing collisions among the particles, identifying faces between two voxels where at least one of the faces violates a stability condition, computing a modified flux using a spatially averaged gradient in the vicinity of the two voxels where the at least one of the faces violates the stability condition, and performing by the computing system, advection operations on the particles to subsequent voxels.

    COMPUTER SYSTEM FOR SIMULATING PHYSICAL PROCESSES USING SURFACE ALGORITHM
    2.
    发明申请
    COMPUTER SYSTEM FOR SIMULATING PHYSICAL PROCESSES USING SURFACE ALGORITHM 有权

    公开(公告)号：US20210406434A1

    公开(公告)日：2021-12-30

    申请号：US16914730

    申请日：2020-06-29

    Applicant: Dassault Systemes Simulia Corp.

    Inventor： Pradeep Gopalakrishnan ,  Raoyang Zhang ,  Hudong Chen ,  Junye Wang ,  Avinash Jammalamadaka

    IPC: G06F30/28 ,  G06F7/485 ,  G06N7/08

    Abstract: Described are computer implemented techniques for simulating elements of a fluid flow. These techniques include storing in a memory state vectors for a plurality of voxels, the state vectors comprising a plurality of entries that correspond to particular momentum states of a plurality of possible momentum states at a voxel, storing in a memory a representation of at least one surface that is sized and oriented independently of the size and orientation of the voxels, perform interaction operations on the state vectors, the interaction operations modelling interactions between elements of different momentum states, perform surface interaction operations on the representation of the surface, the surface interaction operations modelling interactions between the surface and substantially all elements of voxels, and performing move operations on the state vectors to reflect movement of elements to new voxels.

    COMPUTER SIMULATION OF PHYSICAL FLUIDS ON A MESH IN AN ARBITRARY COORDINATE SYSTEM
    5.
    发明申请
    COMPUTER SIMULATION OF PHYSICAL FLUIDS ON A MESH IN AN ARBITRARY COORDINATE SYSTEM 审中-公开

    公开(公告)号：US20200210539A1

    公开(公告)日：2020-07-02

    申请号：US16236799

    申请日：2018-12-31

    Applicant: Dassault Systemes Simulia Corp.

    Inventor： Hudong Chen ,  Raoyang Zhang ,  Pradeep Gopalakrishnan

    IPC: G06F17/50 ,  G01P5/00 ,  G06N7/08

    Abstract: Computer implemented techniques for simulating a fluid flow about a surface of a solid, include receiving a coordinate system for representation of a curvilinear mesh that conforms to the surface of the solid, simulating, with a lattice velocity set transport of particles in a volume of fluid, with the transport causing collision among the particles, executing a distribution function for transport of the particles, with the distribution function including a particle collision determination and a change in particle distribution associated with the curvilinear mesh, performing by the computing system, advection operations in the coordinate system under constraints applied to particle momentum values and mapping by the computer system values resulting from simulating onto the curvilinear mesh by translation of the particle momentum values and spatial coordinates determined in the coordinate system into momentum and spatial values in the curvilinear space.

    Turbulent boundary layer modeling via incorporation of pressure gradient directional effect
    9.
    发明授权
    Turbulent boundary layer modeling via incorporation of pressure gradient directional effect 有权

    公开(公告)号：US11188692B2

    公开(公告)日：2021-11-30

    申请号：US16294242

    申请日：2019-03-06

    Applicant: Dassault Systemes Simulia Corp.

    Inventor： Hudong Chen ,  Raoyang Zhang ,  Yanbing Li

    IPC: G06F30/20

    Abstract: Disclosed are techniques for performing a flow simulation that include storing in a memory state vectors for a plurality of voxels, the state vectors comprising a plurality of entries that correspond to particular momentum states of a plurality of possible momentum states at a voxel. The techniques also include storing in a memory a representation of at least one surface and performing interaction operations on the state vectors, the interaction operations modelling interactions between elements of different momentum states. The techniques also include performing surface interaction operations which model interactions between the surface and elements of at least one voxel near the surface, including modeling a wall shear stress direction that is not parallel to a flow velocity direction and performing move operations on the state vectors to reflect movement of elements to new voxels.

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