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Partitioning method of structural grid

A grid and inner boundary technology, applied in the field of CFD simulation, can solve problems such as unrealizable and difficult partitioning of structural grids, and achieve the effect of maximizing parallel efficiency

Active Publication Date: 2021-03-26
中国空气动力研究与发展中心设备设计及测试技术研究所
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Problems solved by technology

However, when the required number of structural grid blocks is large, for example, when tens of thousands or even hundreds of thousands of processes are used to carry out CFD parallel simulation, since the number of grid blocks must exceed the number of processes, the above-mentioned commercial software is used to analyze the structural network. Grid partitioning is very difficult, or even impossible

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Embodiment Construction

[0048] Aspects of the invention will be described more fully hereinafter with reference to the accompanying drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this invention. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Based on the teachings herein one skilled in the art will appreciate that the scope of the invention is intended to encompass any aspect disclosed herein, whether implemented alone or in combination with any other aspect of the invention. For example, it may be implemented using any number of means or implementations presented herein. Additionally, in addition to the aspects of the invention presented herein, the scope of the invention is intended to encompass an apparatus or method implemented using other structures, f...

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Abstract

The invention is applicable to the technical field of CFD simulation, and provides a structural grid partitioning method, which comprises the following steps of: calculating an average grid quantity borne by each process; taking the grid block with the maximum grid quantity as a mother block, and partitioning the mother block to form a first sub-block and a second sub-block; projecting the physical boundary in the mother block; projecting the inner boundary in the mother block, and updating the corresponding relationship between the inner boundary of the associated block and the mother block;and repeating the above steps, and when the number of grids of all the first sub-blocks and the second sub-blocks after partitioning is not greater than the average grid amount borne by each process,realizing automatic partitioning of the structural grid. According to the partitioning method of the structural grid provided by the invention, the grid amount of each grid block is not greater than the average grid amount borne by each process, so that when CFD parallel numerical simulation is carried out, the task amount borne by each process is approximately consistent, and the parallel efficiency is maximized.

Description

technical field [0001] The invention belongs to the technical field of CFD simulation, and in particular relates to a method for partitioning a structured grid. Background technique [0002] CFD is one of the three major means of studying aerodynamic problems such as aircraft and missiles in addition to wind tunnel tests and flight tests. With the significant improvement of CFD software and computer hardware capabilities, it will gradually replace or partially replace wind tunnels. Trends in testing, flight testing. Due to the limited capability of single-core computer processors, it is difficult to carry out large-scale CFD numerical simulations with tens of millions of grids. Therefore, CFD parallel numerical simulations have become an inevitable choice. CFD parallel numerical simulation assigns simulation tasks to multiple processes, and each process cooperates to complete the CFD numerical simulation work. Theoretically, as the number of processes increases, the number...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28G06F113/08G06F119/14
CPCG06F30/28G06F2113/08G06F2119/14
Inventor 陈勇李玉栋姚向红袁强吴运刚谢伟明胥頔殷可为刘嘉玮叶家伟
Owner 中国空气动力研究与发展中心设备设计及测试技术研究所
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