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.

公开(公告)号：US20200050715A1

公开(公告)日：2020-02-13

申请号：US16059817

申请日：2018-08-09

Applicant: Dassault Systemes Simulia Corp.

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

IPC: G06F17/50 ,  G06F17/10

Abstract: Methods, computer program products, and systems can be used to simulate physical processes. One of the methods includes determining an input flux to be applied to a first element. The method includes determining an applied flux, the applied flux being an amount of flux that can be applied to the first element without causing numerical instability. The method includes determining a balance flux, the balance flux being the difference between the input flux and the applied flux. The method also includes providing the balance flux to a second element.