A parallel code for the direct numerical simulation (DNS) of reactive flows
using detailed chemical kinetics and multicomponent molecular transport is
presented.
This code has been used as a benchmark on several commodity hardware clusters
including two large systems with current state-of-the-art processor and
network technologies: Up to 180 Alpha EV68 833 MHz and up to 400 AthlonMP 1.4
GHz CPUs have been used, which are arranged in dual-nodes with Myrinet-2000
interconnect in both cases.
The influence of the two parallelization levels, inside the dual-nodes and
over the network, on the performance is discussed. Performance results are
related to Cray T3E systems. For a full production run using 256 processors,
the performance of the Dual-Athlon/Myrinet-2000 cluster was more than four
times the performance of a T3E-900.
The other part of the paper presents the results of an investigation of flames
evolving after induced ignition of a premixed mixture under turbulent
conditions.
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