Large eddy simulation system and method for realizing cooperative computing based on latticed-Boltzmann theory

Abstract

The invention discloses a large eddy simulation system and a large eddy simulation method for realizing cooperative computing based on a latticed-Boltzmann theory. The system adopts the technical scheme that a master process module broadcasts input data to other process modules in the system and outputs calculation results of all nodes after all the MIC (many integrated core) process modules and all the CPU (central processing unit) process modules finish all computing tasks; the MIC process modules unload the input data to corresponding MICs for computing and perform data communication with the MIC process modules or CPU process modules of the adjacent nodes, and then the next iteration is executed; the CPU process modules control the cooperative computing of the node and start a corresponding thread for each CPU kernel according to the number of kernels of CPUs so as to compute part of distributed data; meanwhile, data communication with the MIC process modules or CPU process modules of the adjacent nodes is executed, and the next iteration is executed. The large eddy simulation system and the large eddy simulation method implement cooperative computing under multiple nodes by using the advantage of reducing the power consumption of the CPUs and the MICs, so that implementation is simple, and the cost is low.

Description

technical field [0001] The invention relates to a large eddy simulation method based on the lattice Boltzmann theory, in particular to a method and a system for performing large eddy simulation based on the lattice Boltzmann theory and using a CPU and MIC cooperative computing mode. Background technique [0002] The Lattice-Boltzmann Method (LBM, Lattice-Boltzmann Method) has been 20 years since its birth. During this period, it has achieved rapid development in both theoretical and applied research, and has gradually become one of the international hotspots in related fields, attracting the attention of many scholars at home and abroad. Unlike traditional simulation methods, the lattice Boltzmann method is based on molecular kinetic theory with a clear physical background. This method is a special discrete form of the Boltzmann equation. It is a discrete method at the macroscopic level, and a continuous method at the microscopic level, so it is called a mesoscopic simulat...

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Problems solved by technology

[0011] The fast large eddy simulation method using the MIC coprocessor for CPU+MIC collaborative computing in a single node is a very efficient method, but for ultra-large-scale data, the processing of a single node still cannot meet the requirements, so using Based on the LBM method, it is imperative to perform large-eddy simulation with CPU / MIC collaborative calculation on multiple nodes, which can greatly meet the needs of many scientists for processing large-scale data in fluid mechanics

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