Title: Computational fluid dynamics applications on parallel-vector computers
Subtitle: Computations of stirred vessel flows
Authors: Bartels, Christian
Breuer, Michael  
Wechsler, Klaus
Durst, Franz
Language: eng
Subject (DDC): DDC - Dewey Decimal Classification::000 Informatik, Wissen, Systeme
DDC - Dewey Decimal Classification::500 Naturwissenschaften
DDC - Dewey Decimal Classification::600 Technik
Issue Date: 2002
Publisher: Elsevier
Document Type: Article
Journal / Series / Working Paper (HSU): Computers & fluids : an international journal 
Volume: 31
Issue: 1
Page Start: 69
Page End: 97
Publisher Place: Amsterdam
Advances in parallel-vector computers have resulted in a computer architecture that is able to provide the computer power needed for large-scale flow predictions. This is demonstrated in the present paper by applying two parallel-vector computers, one with shared memory and the other with distributed memory, to the computation of stirred vessel flows for a wide range of Reynolds numbers, including laminar and turbulent regimes. The governing equations for unsteady fluid flows, together with appropriate boundary conditions, and the adopted solution procedure are summarized. The implementation of the numerical algorithm into a computer program is outlined. The strategies employed for vectorization and parallelization are described and emphasis is placed on four different parallelization strategies partially taking advantage of a shared-memory architecture. Results of flow predictions inside a vessel stirred by a Rushton turbine are presented. The power characteristic expressed as Newton number versus Reynolds number of the stirrer is well predicted. It is shown that computational fluid dynamics simulations provide reliable results and yields a detailed and accurate picture of the complex flow phenomena observed in stirred-tank reactors. The performance of the simulation code on the two parallel-vector computers was measured and the reasons for the differences in the performances of the two architectures are discussed in detail. © 2001 Elsevier Science Ltd. All rights reserved.
Organization Units (connected with the publication): Universität Erlangen-Nürnberg
ISSN: 00457930
Publisher DOI: 10.1016/S0045-7930(01)00016-0
Appears in Collections:Publications of the HSU Researchers (before HSU)

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