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PRODID:-//Microsoft Corporation//Outlook MIMEDIR//EN
VERSION:1.0
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DTSTART:20131121T180000Z
DTEND:20131121T183000Z
LOCATION:201/203
DESCRIPTION;ENCODING=QUOTED-PRINTABLE:ABSTRACT: WaLBerla is a massively parallel software framework for simulating complex flows with the lattice Boltzmann method (LBM). Performance and scalability results are presented for SuperMUC, the world's fastest x86-based supercomputer ranked number 6 on the Top500 list, and JUQUEEN, a Blue~Gene/Q system ranked as number 5.=0A=0AWe reach resolutions with more than one trillion cells and perform up to 1.93 trillion cell updates per second using 1.8 million threads. The design and implementation of WaLBerla is driven by a careful analysis of the performance on current petascale supercomputers. Our fully distributed data structures  and algorithms allow for efficient, massively parallel simulations on these machines. Elaborate node level optimizations and vectorization using SIMD instructions result in highly optimized compute kernels for the single- and two-relaxation-time LBM. Excellent weak and strong scaling is achieved for a complex vascular geometry of the human coronary tree.
SUMMARY:A Framework for Hybrid Parallel Flow Simulations with a Trillion Cells in Complex Geometries
PRIORITY:3
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