Domain decomposition optimizing method for numerical simulation of structure fire

A numerical simulation and area decomposition technology, applied in resource allocation, electrical digital data processing, program control design, etc., can solve the problems of wasting time, ignoring thermal coupling calculation load, and not providing grid division and allocation methods, etc., to achieve The effect of increasing speed

Inactive Publication Date: 2017-06-09
SHANGHAI JIAO TONG UNIV
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AI Technical Summary

Problems solved by technology

[0004] 1) The appropriate global grid seed size is not given, resulting in the simulation of a case often requiring multiple attempts, which greatly wastes time;
[0005] 2) Only the number of sub-region grids and communication time are cons

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  • Domain decomposition optimizing method for numerical simulation of structure fire
  • Domain decomposition optimizing method for numerical simulation of structure fire
  • Domain decomposition optimizing method for numerical simulation of structure fire

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Embodiment Construction

[0041] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0042] According to the regional decomposition optimization method of building fire numerical simulation provided by the present invention, comprise the following steps:

[0043] Step S1: Build a building model, calculate the global grid size of the building model according to the characteristic diameter of the flame and the empirical formula, and divide the global grid according to the actual situation and the set simulation accuracy;

[0044] Specifically, building a building model refers to: inputtin...

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Abstract

The invention provides a domain decomposition optimizing method for numerical simulation of structure fire. The method comprises the following steps: 1) constructing a building model, calculating an overall grid size of the building model according to a characteristic diameter of the flame and an empirical formula, and dividing the overall grid; 2) acquiring hardware configuration; 3) dividing the building model into sub-domains, of which the quantity is equal to the quantity of modes used in a cluster or the quantity of CPU used in a super computer, according to an influence factor of load balance; 4) verifying the load balance of each divided sub-domain; if balancing, allocating to a corresponding node and calculating; and if not, adopting a mode searching method for adjusting the volume of each sub-domain, wherein the node means the node used in the computer cluster or the usable CPU. According to the invention, the load balance of each computer node can be automatically detected and adjusted; the method is suitable for high-performance super computers and individual clusters; and the speed of numerical simulation is increased.

Description

technical field [0001] The invention relates to the technical field of building fire protection, in particular to an area decomposition optimization method for building fire numerical simulation. Background technique [0002] For the numerical simulation of building fires, due to the huge calculation space, the simulation time is long, which affects the research progress. The simulation time can be greatly shortened by using parallel computing. The basic idea of ​​parallel computing is to decompose a large-scale problem into several small parts, and each part is processed by different processors, and information is transferred between partitions. The improvement of parallel computing ability depends on the development of hardware technology on the one hand, and is closely related to the improvement of computing methods such as partitioning strategies on the other hand. For the numerical simulation of building fires, in addition to making the number of units in each sub-reg...

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Application Information

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IPC IPC(8): G06F9/50
CPCG06F9/5072G06F9/5083G06F2209/5019
Inventor 江列霖杨培中史超
Owner SHANGHAI JIAO TONG UNIV
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