Back to results
US 10,503,845 B2Granted
Particle-in-cell methods preserving shearing and rotation
AssigneeDisney Enterprises, Inc.
InventorsAlexey Stomakhin, Joseph Teran
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeDisney Enterprises, Inc.
InventorsAlexey Stomakhin, Joseph Teran
Estimating the term…
The disclosure provides an approach for reducing information loss when transferring from particles to grid and vice versa in a hybrid Lagrangian/Eulerian simulation, while also preserving stability. In one aspect, referred to as the rigid particle-in-cell (RPIC) method, a simulation application stores a sampling of local angular momentum for each particle, helping to preserve the angular momentum that would otherwise be lost in the transfer from grid to particles. In another aspect that is more generally applicable and referred to herein as the rigid and shearing particle-in-cell (RSPIC) method, the simulation application stores, for each particle, a matrix with rotational and shearing information. The RSPIC method effectively reduces dissipation, preserves angular momentum exactly, and prevents instabilities. Further, the RSPIC method is applicable to both incompressible liquids and material point method (MPM) simulations of materials such as solids.
A computer-implemented method of simulating and rendering a visual depiction of a system, comprising:
A non-transitory computer-readable storage medium storing a program, which, when executed by a processor performs operations for simulating and rendering a visual depiction of a system, the operations comprising:
A system, comprising:
Dependencies are inferred from the claim text.