Multi-processing on supercomputers for computational aerodynamicsThe MIMD concept is applied, through multitasking, with relatively minor modifications to an existing code for a single processor. This approach maps the available memory to multiple processors, exploiting the C-FORTRAN-Unix interface. An existing single processor algorithm is mapped without the need for developing a new algorithm. The procedure of designing a code utilizing this approach is automated with the Unix stream editor. A Multiple Processor Multiple Grid (MPMG) code is developed as a demonstration of this approach. This code solves the three-dimensional, Reynolds-averaged, thin-layer and slender-layer Navier-Stokes equations with an implicit, approximately factored and diagonalized method. This solver is applied to a generic, oblique-wing aircraft problem on a four-processor computer using one process for data management and nonparallel computations and three processes for pseudotime advance on three different grid systems.
Document ID
19900035144
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Yarrow, Maurice (NASA Ames Research Center; Sterling Software Moffett Field, CA, United States)
Mehta, Unmeel B. (NASA Ames Research Center Moffett Field, CA, United States)