Result post-processing oriented OpenFOAM finite volume analysis result data format and transformation method thereof

Abstract

The invention relates to a result post-processing oriented OpenFOAM finite volume analysis result data format and transformation method thereof. The step includes: finding an OpenFOAM grid file and aresult data file; matching expressions containing data information in the grid file and the result data file by using regular expressions; establishing and completing mapping relationships between alldata files; defining a data storage form (syntax, semantics, and a format of an XML file); and generating and exporting data files with the mapping relationships according to the XML file format. Theinvention provides a syntax of XML format, realizes automatic transformation of OpenFOAM result data file to the XML format, and provides an interface file for post-processing of OpenFOAM simulationcalculation results and secondary development. The file structure is clear and intuitive, and facilitates reading and data extraction and transmission.

Description

Technical field [0001] The invention relates to a post-processing data conversion method of a Finite Volume Method analysis result, in particular to a OpenFOAM finite volume analysis result data format and conversion method for result post-processing . Background technique [0002] As an open source object-oriented computational fluid dynamics (CFD) class library, OpenFOAM is similar to the commercial CFD software Fluent and ANSYS CFX. However, due to the closed nature of commercial software, users cannot deeply understand algorithms and processes, and customize functions according to their needs. In this regard, OpenFOAM not only has the computing power of commercial software, but also has strong openness and flexibility. Its code is completely open, and users can set any parameters such as grid division, calculation model, solver, and parallel computing according to their needs. , and perform numerical simulations. In addition, using OpenFOAM does not need to pay high f...

AI Technical Summary

Problems solved by technology

[0003] However, the OpenFOAM post-processing part is relatively weak

If the user needs to post-process the calculation results of OpenFOAM, or extract the required result data for secondary calculation and analysis, or need to carry out secondary development based on OpenFOAM, then the result files must be manually screened, because OpenFOAM generates The resulting data files are large in number and are related. For example, the grid file needs to be comprehensively determined by multiple files, so it is not convenient for users to read, extract and transfer data, and it takes a lot of time and effort; or through other third-party software Manually process the results. At present, the software used for the post-processing of OpenFOAM numerical calculation results mainly includes Paraview, Tecplot, etc., but it is still unable to complete in-depth customization work, and requires programmers to complete a large number of interactive program operations

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