Read e-book online 2nd Int'l Conference on Numerical Methods in Fluid Dynamics PDF

By Maurice Holt

ISBN-10: 3540054073

ISBN-13: 9783540054078

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Assume, furthermore, that a one-year run (and, more precisely, 365 days + 5 days to start-up the computations) is to be carried out. This will result in 35 520 advection time-steps and in 213 120 chemical time-steps. Consider now the case where the model is three-dimensional. Assume that ten layers are used in the vertical direction. e. ten times greater than in the previous case). The numbers of advection and chemical time-steps remain the same, 35 520 and 213 120 respectively. More general, the number of equations in each ODE system is equal to the product of the number of the grid-points and the number of chemical species.

The development of a more advanced air pollution model is normally carried out in two stages: starting with models defined on coarse grids with a few chemical compounds, and arriving gradually to very advanced mathematical models utilizing fine grids and involving many more chemical compounds. Similar stages are also used in the development of advanced mathematical models in other areas of science and engineering. 2. The question: Are the mathematical models used at present sufficient for studying the most important environmental problems?

114]) and the Message Passing Interface (MPI, Gropp et al. [124]), have been used to facilitate the transition of the code from one high-speed computer to another and, hopefully, to facilitate the implementation of the code on computer architectures which will appear in the near future. 1. Some of the problems are only treated as two-dimensional models. This means that it is still necessary to improve the performance of the different algorithms on different high speed computers. Therefore, many more experiments are needed (and will be carried out in the future).

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2nd Int'l Conference on Numerical Methods in Fluid Dynamics by Maurice Holt

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