Gridgen's Implementation of Partial Differential Equation Based Structured Grid Generation Methods

Elliptic and hyperbolic partial differential equation methods for generating both surface and volume structured grids have been implemented in the Gridgen software system. Their implementation provides the means by which very high quality quad and hex grids can be generated for computational fluid dynamics (CFD). The grids, in turn, provide the basis for highly accurate CFD simulations of viscous flow fields. The development and implementation of these methods resulted in several unique attributes: the ability to create grids that are topologically independent of the underlying geometry model, the ability to use a hyperbolic method to generate a surface grid spanning multiple trimmed B-Spline surfaces, and special boundary condition treatments that allow multi-block abutting grids to be generated using the hyperbolic method.