Time-Accurate Simulatiion of Moving Bodies Using Unstructured Technology

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$746,266.00
Award Year:
1996
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Award Id:
25663
Agency Tracking Number:
25663
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
1872 Pratt Drive, Suite 1275, Blacksburg, VA, 24060
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Dr. William D. Mcgrory
(703) 231-8397
Business Contact:
() -
Research Institution:
n/a
Abstract
A robust and accurate extension of an existing state-of-the-art steady-state compressible unstructured flow solver and grid generation package to include time-accurate simulation of multiple moving bodies is proposed. Improvedments to existing algorithms should enable the routine simulation of such problems as aircraft store separation phenomena. A discretization of the time-dependent Navier-Stokes equations will be modified to include the effects of moving grids and arbitrarily high temporal accuracy. Restrictions in maximum allowable time step will be eliminated through the use of an implicit dual-time-step formulation. Preconditioning the compressible Navier-Stokes equations will eliminate stiffness of convergence due to Mach number, Reynolds number and cell aspect ration such that the formulation will be appropriate for very low Mach number and transonic flows. Unstructured discretization of the domain is accomplished with algorithms based upon three-dimensional advancing front technology as well as Delaunay triangulation. Solution accuracy will be improved through the use of global and local element refinement.

* information listed above is at the time of submission.

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