A New Inviscid Wall Boundary Condition Treatment for Embedded Boundary Cartesian Grid Schemes

David D. Marshall, Georgia Institute of Technology - Main Campus
Stephen M. Ruffin, Georgia Institute of Technology - Main Campus

Article comments

8 pages.

Copyright © 2004 David D. Marshall and Stephen M. Ruffin. Published by American Institute of Aeronautics and Astronautics, Inc..

NOTE: At the time of publication, the author David D. Marshall was not yet affiliated with Cal Poly.

Abstract

This work presents a new inviscid wall boundary condition technique for embedded Cartesian grid schemes. This scheme eliminates the time step restrictions associated with the arbitrarily small control volumes that can result when the surface cuts the Cartesian control volumes. The cells adjacent to the surface are removed from the control volume formulation and are instead solved via an interpolation technique which utilizes the wall boundary conditions to build the interpolating functions. Two different interpolation techniques are presented, one without considering wall curvature and one considering wall curvature. Results are compared to a two-dimensional airfoil case and a three-dimensional wing case.