Vortex Flows and Related Numerical Methods II
ESAIM: Proceedings,
Vol. 1, 1996, pp. 213-223
Massively Parallel Implementation of a 3D Vortex-Boundary
Element Method
Adrin Gharakhani and Ahmed F. Ghoniem
Department of Mechanical Engineering
Massachusetts Institute of Technology
Cambridge, MA 02139, USA
Abstract
Vortex-boundary element simulation of three-dimensional wall-bounded
flows is performed on a massively parallel architecture using the data
parallel paradigm. With proper optimization, implementation on the
Thinking Machines CM5 is shown to yield over an order of magnitude
speed-up over the Cray C90, using 128 processors. This makes the
direct evaluation of the flow field represented by up to 100000
vortex elements feasible. In this paper, the CPU time and memory
requirements for the direct evaluation of the vortical field using
three parallelization algorithms are compared. In addition,
performance results for the evaluation of the vortical and potential
velocities, and their gradients, are presented as a function of the
number of vortex elements and the number of processing nodes.
Finally, to demonstrate the capability of the developed method,
preliminary results from the case of flow around a stationary,
idealized trailer truck near the ground level at Re=500 are
presented.
Vortex Flows and Related
Numerical Methods II
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