Surface grid generation methods for overset grids

Abstract

Efficient methods for performing surface grid generation for overset (overlapping) grids are presented. These include a scheme using hyperbolic partial differential equations and an algebraic marching scheme. The combined use of hyperbolic and algebraic methods in easing the task of surface domain decomposition and surface grid generation for the Chimera overset grid approach is discussed. Extensions of a basic hyperbolic scheme are made to march over a collection of panel networks where each network consists of a rectangular array of panels (quadrilateral cells). Other enhancements include a more robust projection scheme and methods to improve grid boundary control. Examples are given for general applications in overset grid methods such as collar grids for intersecting geometric components and cap grids at fuselage noses and wing tips. More complex examples include surface grids for the Space Shuttle Orbiter and the V-22 tiltrotor.