Skip to Content
Find More Like This
Return to Search

Apparatus for and method of simulating turbulence

United States Patent

January 28, 2003
View the Complete Patent at the US Patent & Trademark Office
In accordance with a preferred embodiment of the invention, a novel apparatus for and method of simulating physical processes such as fluid flow is provided. Fluid flow near a boundary or wall of an object is represented by a collection of vortex sheet layers. The layers are composed of a grid or mesh of one or more geometrically shaped space filling elements. In the preferred embodiment, the space filling elements take on a triangular shape. An Eulerian approach is employed for the vortex sheets, where a finite-volume scheme is used on the prismatic grid formed by the vortex sheet layers. A Lagrangian approach is employed for the vortical elements (e.g., vortex tubes or filaments) found in the remainder of the flow domain. To reduce the computational time, a hairpin removal scheme is employed to reduce the number of vortex filaments, and a Fast Multipole Method (FMM), preferably implemented using parallel processing techniques, reduces the computation of the velocity field.
Dimas; Athanassios (Rockville, MD), Lottati; Isaac (Potomac, MD), Bernard; Peter (Silver Spring, MD), Collins; James (Sykesville, MD), Geiger; James C. (Rockville, MD)
Vorcat, Inc. (Rockville, MD)
09/ 401,184
September 23, 1999
Government Interest: This invention was made with government support under Grant No. DE-FG02-97ER82413 awarded by the Department of Energy. The government has certain rights in the invention.