Accession Number:

ADD019910

Title:

Method for Computing Three Dimensional Unsteady Flows by Solution of the Vorticity Equation on a Lagrangian Mesh

Descriptive Note:

Patent Application, Filed 29 Sep 2000

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Report Date:

2000-09-29

Pagination or Media Count:

35.0

Abstract:

A method for computing three dimensional unsteady flows about an object. An allowable error is established for the vorticity term calculations, and object geometry is provided giving surface points on an object and a region of interest. A mesh is established incorporating points on the object. Initial flow conditions are set at the surface. Vorticity values that will satisfy boundary conditions are set at the provided surface points. A new mesh is established incorporating the provided points and other points in the region of interest. Boxes are generated containing the provided points and other points. Velocities and pressures at each point are calculated from the flow conditions, vorticity values and boundary conditions. A time variable is incremented and each point is moved by applying the calculated velocity. Vorticity at each point is then recalculated. The method is iterated starting with the step of satisfying boundary conditions until the incremented time variable exceeds a predetermined value.

Subject Categories:

  • Numerical Mathematics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE