公开(公告)号：US20250068797A1

公开(公告)日：2025-02-27

申请号：US18937421

申请日：2024-11-05

Applicant: Dassault Systemes Americas Corp.

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

IPC: G06F30/25 ,  G06F111/10

Abstract: Disclosed are techniques for scalar solvers in flow simulations that include simulating using a scalar lattice velocity set in a computing system, movement of scalar particles representing a scalar quantity in a volume of fluid, with the scalar particles carried by flow particles of the volume of fluid, and with the movement of the scalar particles causing collisions among the scalar particles; and evaluating, a non-equilibrium post-collide scalar distribution function of a specified order that is representative of the scalar collision.

公开(公告)号：US12079552B2

公开(公告)日：2024-09-03

申请号：US17689131

申请日：2022-03-08

Applicant: Dassault Systemes Americas Corp.

Inventor： Pradeep Gopalakrishnan ,  Hudong Chen ,  Raoyang Zhang ,  Avinash Jammalamadaka ,  Yanbing Li

IPC: G06F30/23 ,  G06F30/28 ,  G06F111/10 ,  G06F113/08

CPC classification number: G06F30/23 ,  G06F30/28 ,  G06F2111/10 ,  G06F2113/08

Abstract: Techniques for simulating fluid flow using a lattice Boltzmann (LB) approach for solving scalar transport equations and solving for total energy are described. In addition to the lattice Boltzmann functions for fluid flow the techniques include modifying a set of state vectors of the particles by adding specific total energy to states of particles that will be advected and subtracting the specific total energy from states of particles that will not be advected over a time interval and performing advection of the particles according to the modified set of states.

公开(公告)号：US20250005234A1

公开(公告)日：2025-01-02

申请号：US18826827

申请日：2024-09-06

Applicant: Dassault Systemes Americas Corp.

Inventor： Pradeep Gopalakrishnan ,  Raoyang Zhang ,  Hudong Chen

IPC: G06F30/25 ,  G06F17/11 ,  G06F30/23 ,  G06F30/28 ,  G06F30/367 ,  G06F111/08 ,  G06F111/10 ,  G06F113/08

Abstract: Techniques for simulating fluid flow on a computer that involve a stable entropy solver are described. The techniques include simulating activity of a fluid across a mesh, the activity of the fluid being simulated so as to model movement of particles across the mesh, storing, in a computer accessible memory, a set of state vectors for each mesh location in the mesh, each of the state vectors comprising a plurality of entries that correspond to particular momentum states of possible momentum states at a corresponding mesh location, simulating a time evolution of entropy of the flow by collecting incoming set of distributions from neighboring mesh locations for the collision operation, calculating by the computer scalar values in each location, determining outgoing distributions as a product of the collision operation and addition of a heat source, and modifying the flow by the computer performing for a time interval, an advection of the particles to subsequent mesh locations.

公开(公告)号：US12118279B2

公开(公告)日：2024-10-15

申请号：US16274403

申请日：2019-02-13

Applicant: Dassault Systemes Americas Corp.

Inventor： Pradeep Gopalakrishnan ,  Raoyang Zhang ,  Hudong Chen

IPC: G06F30/25 ,  G06F17/11 ,  G06F30/23 ,  G06F30/28 ,  G06F30/367 ,  G06F111/08 ,  G06F111/10 ,  G06F113/08

CPC classification number: G06F30/25 ,  G06F17/11 ,  G06F30/23 ,  G06F30/28 ,  G06F30/367 ,  G06F2111/08 ,  G06F2111/10 ,  G06F2113/08

Abstract: Techniques for simulating fluid flow on a computer that involve a stable entropy solver are described. The techniques include simulating activity of a fluid across a mesh, the activity of the fluid being simulated so as to model movement of particles across the mesh, storing, in a computer accessible memory, a set of state vectors for each mesh location in the mesh, each of the state vectors comprising a plurality of entries that correspond to particular momentum states of possible momentum states at a corresponding mesh location, simulating a time evolution of entropy of the flow by collecting incoming set of distributions from neighboring mesh locations for the collision operation, calculating by the computer scalar values in each location, determining outgoing distributions as a product of the collision operation and addition of a heat source, and modifying the flow by the computer performing for a time interval, an advection of the particles to subsequent mesh locations.

公开(公告)号：US12169669B2

公开(公告)日：2024-12-17

申请号：US16987820

申请日：2020-08-07

Applicant: Dassault Systemes Americas Corp.

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

IPC: G06F30/25 ,  G06F111/10

Abstract: Disclosed are techniques for scalar solvers in flow simulations that include simulating using a scalar lattice velocity set in a computing system, movement of scalar particles representing a scalar quantity in a volume of fluid, with the scalar particles carried by flow particles of the volume of fluid, and with the movement of the scalar particles causing collisions among the scalar particles; and evaluating, a non-equilibrium post-collide scalar distribution function of a specified order that is representative of the scalar collision.