Running a large air pollution model on an IBM SMP computer

Authors:
Wojciech Owczarx;Zahari Zlatev
Affiliations:
Danish Computing Centre for Research and Education, Technical University of Denmark, Building 304, Lyngby, Denmark;National Environmental Research Institute, Frederiksborgvej 399, P.O. Box 358, Roskilde, Denmark
Venue:
Practical parallel computing
Year:
2001

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Abstract

The preparation of an efficient air pollution code for an IBM SMP computer with two levels of parallelism is discussed. Only two nodes are available on the IBM SMP computer that has actually been used. Therefore, a relatively small problem has been applied in the experiments. The 2-D version of an air pollution problem was discretized on a (96×96) grid. The number of the chemical species was 35. This computational problem, leading to the solution of ODE systems of 322560 equations during many thousands of time-steps, is still very big for many of the existing high-speed computers. Moreover, this version of the model is in fact the operational version at present. More details about this version can be found in the web-site of the model: http://www.dmu.dk/AtmosphericEnvironment/DEM.