NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
A Unified Overset Grid Generation Graphical Interface and New Concepts on Automatic Gridding Around Surface DiscontinuitiesFor many years, generation of overset grids for complex configurations has required the use of a number of different independently developed software utilities. Results created by each step were then visualized using a separate visualization tool before moving on to the next. A new software tool called OVERGRID was developed which allows the user to perform all the grid generation steps and visualization under one environment. OVERGRID provides grid diagnostic functions such as surface tangent and normal checks as well as grid manipulation functions such as extraction, extrapolation, concatenation, redistribution, smoothing, and projection. Moreover, it also contains hyperbolic surface and volume grid generation modules that are specifically suited for overset grid generation. It is the first time that such a unified interface existed for the creation of overset grids for complex geometries. New concepts on automatic overset surface grid generation around surface discontinuities will also be briefly presented. Special control curves on the surface such as intersection curves, sharp edges, open boundaries, are called seam curves. The seam curves are first automatically extracted from a multiple panel network description of the surface. Points where three or more seam curves meet are automatically identified and are called seam corners. Seam corner surface grids are automatically generated using a singular axis topology. Hyperbolic surface grids are then grown from the seam curves that are automatically trimmed away from the seam corners.
Document ID
20020066660
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Chan, William M.
(MCAT Inst. Moffett Field, CA United States)
Akien, Edwin
Date Acquired
August 20, 2013
Publication Date
August 6, 2002
Subject Category
Computer Programming And Software
Meeting Information
Meeting: 4th Symposium on Overset Composite Grid and Solution Technology
Location: Aberdeen Providing Ground, MD
Country: United States
Start Date: September 23, 1998
End Date: September 25, 1998
Sponsors: Army Research Lab.
Funding Number(s)
CONTRACT_GRANT: NAS2-14109
PROJECT: RTOP 581-10-12
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Available Downloads

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