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Title: Apparatus for and method of simulating turbulence

Abstract

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.

Inventors:
 [1];  [2];  [3];  [4];  [1]
  1. (Rockville, MD)
  2. (Potomac, MD)
  3. (Silver Spring, MD)
  4. (Sykesville, MD)
Issue Date:
Research Org.:
Krispin Technologies, Inc., Rockville, MD (United States)
OSTI Identifier:
875014
Patent Number(s):
6512999
Assignee:
Vorcat, Inc. (Rockville, MD) CHO
DOE Contract Number:  
FG02-97ER82413
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
apparatus; method; simulating; turbulence; embodiment; novel; physical; processes; fluid; flow; provided; near; boundary; wall; represented; collection; vortex; sheet; layers; composed; grid; mesh; geometrically; shaped; space; filling; elements; triangular; shape; eulerian; approach; employed; sheets; finite-volume; scheme; prismatic; formed; lagrangian; vortical; tubes; filaments; found; remainder; domain; reduce; computational; time; hairpin; removal; fast; multipole; fmm; implemented; parallel; processing; techniques; reduces; computation; velocity; field; fluid flow; /703/

Citation Formats

Dimas, Athanassios, Lottati, Isaac, Bernard, Peter, Collins, James, and Geiger, James C. Apparatus for and method of simulating turbulence. United States: N. p., 2003. Web.
Dimas, Athanassios, Lottati, Isaac, Bernard, Peter, Collins, James, & Geiger, James C. Apparatus for and method of simulating turbulence. United States.
Dimas, Athanassios, Lottati, Isaac, Bernard, Peter, Collins, James, and Geiger, James C. Wed . "Apparatus for and method of simulating turbulence". United States. https://www.osti.gov/servlets/purl/875014.
@article{osti_875014,
title = {Apparatus for and method of simulating turbulence},
author = {Dimas, Athanassios and Lottati, Isaac and Bernard, Peter and Collins, James and Geiger, James C.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {1}
}

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