Interactive grid generation and NURBS applications

摘要

This paper addresses recent developments of grid generation techniques employing nonuniform rational B-spline formulations (NURBS). Grid refinement algorithms for arbitrary curves and surfaces with NURBS maintain high fidelity of the geometry, and allow time-efficient interactive grid generation. Bezier curve formulations are utilized to subdivide surface patches to accomplish a smooth and near orthogonal zonal grid. A CAD/Grid interface code based on NURBS formulations has been developed which converts CAD data from IGES files into the format accepted by the structured grid system. Two interactive grid generation codes, a general-purpose code and a customized one for turbomachinery configurations, have been developed on the basis of NURBS' definition.