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Design of Parallel Algorithms for Lattice Boltzmann Method and Numerical Simulations

Author: HanHaiFeng
Tutor: ShiBaoChang
School: Huazhong University of Science and Technology
Course: Computational Mathematics
Keywords: Lattice Boltzmann Method Cavity flow High-performance computing Numerical Simulation Speedup
CLC: O246
Type: Master's thesis
Year: 2004
Downloads: 544
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Abstract


Large-scale scientific and engineering computing is recognized as the third method of scientific research in experimental and theoretical research methods are equally important . Single computer due to hardware limitations , its computing power is far from being able to meet the requirements of large-scale scientific and engineering computing , high-performance parallel computing has become the only way to achieve this calculation . Simulation of fluid movement has been one of the most important areas of large-scale scientific and engineering computing , is a very challenging task . In recent years, the microscopic model of the lattice Boltzmann method simulation of fluid flow in recent years developed a new method of calculation . Lattice Boltzmann method has a simple calculation , be able to deal with complex boundary problems , natural parallel many advantages. Lattice Boltzmann Method on fluid simulation and modeling has made important progress , but the study of the performance of parallel lattice Boltzmann method is still small , more efficient use of the lattice Boltzmann method in order to enable the calculation of workers , the paper focuses on the divided in a variety of modes of communication and different regions under the parallel performance of the lattice Boltzmann method . RedHat Linux environment , this paper discusses the parallel implementation of the LBM method . The other designed cavity flow problem blocking communication mode and non-blocking communication mode parallel algorithms and procedures , and each other cavity flow divided in different regions of the parallel performance of the lattice Boltzmann method based on ANSI C and parallel library functions MPI (Message Passing Interface) . We found that , with the grid increases in the number , there will be some of the new phenomenon . With the preparation of the parallel program , the two - dimensional square cavity for Re = 10000 flow study its cyclical phenomenon . Study of three-dimensional cavity flow , by encrypting the grid , we found no new phenomenon , confirms previous work in the forecast .

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CLC: > Mathematical sciences and chemical > Mathematics > Computational Mathematics > Numerical Parallel Computation
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