The Pegasus software is used as a pre-processor for overset-grid computational fluid dynamic (CFD) simulations. The main features of the software include: automated hole cutting algorithms; a projection scheme for fixing small discretization errors in overset surfaces; efficient interpolation search methods; hole-size optimization based on adding additional layers of fringe points; and an automatic restart capability. The code can be run in parallel using the Message-Passing Interface standard. The parallelization performance provides efficient speed-up of the execution time capable of utilizing dozens or even hundreds of processors.

This work was done by Stuart Rogers of Ames Research Center, and William Dietz and Norman Suhs of Micro Craft Inc. For more information, visit http://people.nas.nasa.gov/~rogers/pegasus/intro.html . Contact the Ames Technology Partnerships Office at 1-855-627-2249 or This email address is being protected from spambots. You need JavaScript enabled to view it.. Refer to ARC-15117-1.


NASA Tech Briefs Magazine

This article first appeared in the February, 2015 issue of NASA Tech Briefs Magazine.

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