NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
A self-adaptive-grid method with application to airfoil flowA self-adaptive-grid method is described that is suitable for multidimensional steady and unsteady computations. Based on variational principles, a spring analogy is used to redistribute grid points in an optimal sense to reduce the overall solution error. User-specified parameters, denoting both maximum and minimum permissible grid spacings, are used to define the all-important constants, thereby minimizing the empiricism and making the method self-adaptive. Operator splitting and one-sided controls for orthogonality and smoothness are used to make the method practical, robust, and efficient. Examples are included for both steady and unsteady viscous flow computations about airfoils in two dimensions, as well as for a steady inviscid flow computation and a one-dimensional case. These examples illustrate the precise control the user has with the self-adaptive method and demonstrate a significant improvement in accuracy and quality of the solutions.
Document ID
19850058806
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Nakahashi, K.
(NASA Ames Research Center Moffett Field, CA, United States)
Deiwert, G. S.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1985
Subject Category
Aerodynamics
Report/Patent Number
AIAA PAPER 85-1525
Meeting Information
Meeting: Computational Fluid Dynamics Conference
Location: Cincinnati, OH
Start Date: July 15, 1985
End Date: July 17, 1985
Accession Number
85A40957
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available