A 3D Numerical Simulation Method for Heat Conduction in Continuous-Discontinuous Media
A technology of three-dimensional numerical and simulation methods, which is applied in CAD numerical modeling, electrical digital data processing, and special data processing applications, etc., can solve problems such as continuous-discontinuous medium heat transfer analysis problems, and achieve good results. Effect of treatment
Active Publication Date: 2020-09-04
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Therefore, these two types of methods cannot deal with the heat transfer analysis problems of continuous-discontinuous media well
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[0041] In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0042] Please refer to figure 1 , an embodiment of the present invention provides a three-dimensional numerical simulation method for continuous-discontinuous medium heat conduction, comprising the following steps:
[0043] S1: Divide the continuous-discontinuous medium into several polyhedral solid units (such as tetrahedral units, hexahedral units, voronoi units, etc.) The common surfaces of the solid elements are marked as fracture surfaces, and the common surfaces of the solid elements located at the continuous surfaces in the continuous-discontinuous medium are marked as non-fracture surfaces.
[0044]Existing commercial finite element software, pre- and post-processing software, or some open source grid programs can be used to divide the continuou...
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The present invention provides a 3D numerical simulation method of continuous-discontinuous media heat conduction, comprising the steps of dividing the discontinuous medium into a plurality of polyhedral solid elements, and marking the common surface of the solid elements located at the discontinuous surface as a fracture surface; calculating a heat flux of each node in each solid element according to heat transfer between nodes in the solid element; transferring heat between adjacent solid elements through a common surface, wherein the heat flux of each node between solid elements whose common surface is a non-fracture surface and the heat flux of each node between solid elements whose common surface is a fracture surface are calculated according to the heat transfer between the solid elements; calculating the total heat flux of each node according to the heat flux of each node in the solid element and the heat flux of each node between the solid elements, and updating the temperatureof each node by the total heat flux of each node according to the finite difference integration strategy, so as to complete the whole three-dimensional numerical simulation.
Description
technical field [0001] The invention relates to the technical field of medium heat conduction in geothermal, petroleum and natural gas exploitation, nuclear waste disposal, energy environment, and geotechnical engineering, and in particular relates to a three-dimensional numerical simulation method for continuous-discontinuous medium heat conduction. Background technique [0002] The problem of heat conduction in continuous-discontinuous media involves engineering applications such as geothermal exploitation, oil and gas exploitation, and nuclear waste disposal. With the development of computer hardware and computing simulation technology, the numerical simulation method has gradually become a powerful tool for heat transfer analysis and calculation. At present, the main calculation methods for solving heat transfer problems are the finite element method and the finite difference method. The basic principles of these two methods are to divide the continuum into grids, and t...
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IPC IPC(8): G06F30/20G06F119/08G06F113/08G06F111/10
CPCG06F30/20
Inventor 严成增
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)