Three-dimensional self-adaptive grid method for complex flowsA self-adaptive grid procedure for efficient computation of three-dimensional complex flow fields is described. The method is based on variational principles to minimize the energy of a spring system analogy which redistributes the grid points. Grid control parameters are determined by specifying maximum and minimum grid spacing. Multidirectional adaptation is achieved by splitting the procedure into a sequence of successive applications of a unidirectional adaptation. One-sided, two-directional constraints for orthogonality and smoothness are used to enhance the efficiency of the method. Feasibility of the scheme is demonstrated by application to a multinozzle, afterbody, plume flow field. Application of the algorithm for initial grid generation is illustrated by constructing a three-dimensional grid about a bump-like geometry.
Document ID
19900039448
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Djomehri, M. Jahed (NASA Ames Research Center Moffett Field, CA, United States)
Deiwert, George S. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1988
Subject Category
Aerodynamics
Meeting Information
Meeting: Intl. Conference on Numerical Grid Generation in Computational Fluid Mechanics ''88