Accession Number:

ADD020207

Title:

A Method to Simulate Unsteady Turbulent Flows Using a Vorticity Based Method

Descriptive Note:

Patent application, Filed 9 May 2005

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

2005-06-27

Pagination or Media Count:

25.0

Abstract:

This patent application involves a computerized method for determining the velocity field of a three-dimensional fluid flow over a submerged body. Inflow velocities, turbulence, spectral behavior is provided over a body geometry. The method uses filament elements near the body and blob elements at a distance from the body. Velocity and vorticity are calculated at each time increment and then the elements are evolved based on the calculated values. Blob elements are moved using the centroid of the blob, and filament elements are moved by use the ends of the filaments. New elements are added as required upstream in the flow field. The time is incremented and the routine is repeated for a period of interest, providing a model of the flow field about the body. Hairpin filaments can be modeled by attaching multiple filaments end to end.

Subject Categories:

  • Computer Programming and Software
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE