A POROSITY TECHNIQUE FOR THE DEFINITION OF OBSTACLES IN RECTANGULAR CELL MESHES

This paper describes a technique for computing flows bounded by complicated geometric shapes. Grid distortion problems are eliminated by using a grid composed of rectangular cells. Geometric boundaries are defined within this grid using a porosity technique in which the porosity has a zero value within obstacles and a unit value elsewhere. Certain consistency requirements are presented that guide the porosity formulation into a numerical solution algorithm having stability properties. The resulting formulation can be used with the full Navier-Stokes equations or for potential flow applications.

• Supplemental Notes:
  • Conference paper
• Authors:
  • Hirt, C W
  • Sicilian, J M
• Conference:
  • International Conference on Numerical Ship Hydrodynamics, 4th
  • Location: Washington, DC
  • Date: 1985-9-24 to 1985-9-27
• Publication Date: 0

Media Info

• Features: References;
• Pagination: 19p.

Subject/Index Terms

• TRT Terms: Boundary value problems; Flow; Fluid dynamics; Grids (Transmission lines); Numerical analysis
• Uncontrolled Terms: Boundaries; Boundary conditions; Fluid flow; Grids
• Old TRIS Terms: Ship hydrodynamics
• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00650606
• Record Type: Publication
• Source Agency: Maritime Technical Information Facility
• Files: TRIS
• Created Date: Jul 21 1994 12:00AM