CN108846059A - OpenFOAM limited bulk analysis result data format and its conversion method towards result post-processing - Google Patents
OpenFOAM limited bulk analysis result data format and its conversion method towards result post-processing Download PDFInfo
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- CN108846059A CN108846059A CN201810558704.9A CN201810558704A CN108846059A CN 108846059 A CN108846059 A CN 108846059A CN 201810558704 A CN201810558704 A CN 201810558704A CN 108846059 A CN108846059 A CN 108846059A
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- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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Abstract
The present invention relates to the OpenFOAM limited bulk analysis result data formats and its conversion method, step that post-process towards result to include：Find OpenFOAM grid file and result data files；By the expression formula in regular expression matching grid file and result data files including data information；It establishes and completes the mapping relations between all data files；Define data storage form, the i.e. grammer, semanteme and format of XML file；It is generated according to XML file format and exports the data file containing mapping relations.The present invention provides a kind of grammers of XML format, realize OpenFOAM result data files to the automatic conversion of XML format, provide a kind of interface document with secondary development to post-process for OpenFOAM simulation result.This document is clear in structure, intuitive, easy to read, the extraction and transmitting of data.
Description
Technical field
The present invention relates to limited bulk (Finite Volume Method) analysis results to post-process data transfer device, special
It is not a kind ofOpenFOAM limited bulk analysis result data format and its conversion method towards result post-processing。
Background technique
Fluid Mechanics Computation (CFD) class libraries of OpenFOAM as the object-oriented of open source, with commercial CFD code
Fluent, ANSYS CFX are similar.However, due to business software closure cause user can not depth resolving Algorithm and process, and
Function is customized according to their own needs.This respect, OpenFOAM not only have the computing capability of business software, but also have very strong
Opening and flexibility, code full disclosure, user can be according to demand to grid dividing, computation model, solver, simultaneously
The arbitrary parameters such as row calculating are configured, and carry out numerical simulation.In addition, not needed as business software using OpenFOAM
Pay the expense of great number.
However, OpenFOAM post-processing section point is relatively weak.If user needs to carry out from the calculated result of OpenFOAM
Post-processing is perhaps therefrom extracted required result data for secondary calculating and analysis or needs to be carried out based on OpenFOAM
Secondary development, then must also be screened manually to destination file, the result data files quantity generated due to OpenFOAM
It is more and have relevance, such as：Grid file needs multiple files are comprehensive to determine, therefore is not easy to that user reads, data mention
It takes and transmits, require a great deal of time and energy；Or artificial treatment also is carried out to result by other third party softwares,
Software currently used for the post-processing of OpenFOAM numerical result mainly has Paraview, Tecplot etc., but still can not be complete
At the customization work of depth, and program staff is needed to complete a large amount of interactive program operation.In consideration of it, it is necessary to provide one kind just
It is read in user, data are extracted and the OpenFOAM Simulation result data format and conversion method of transmitting.
Summary of the invention
The purpose of the present invention is a kind of OpenFOAM Simulation result data lattice for reading convenient for user, data extraction and transmitting
Formula and conversion method.This method provides a kind of grammers of XML format, realize OpenFOAM result data files to XML
The conversion of format, to provide a kind of interface document with secondary development for the post-processing of OpenFOAM simulation result.
To achieve the goals above, the present invention provides a kind of OpenFOAM limited bulk analyses towards result post-processing
Result data format and its conversion method, the conversion method can be automatically performed by programming by computer, mainly include following step
Suddenly：
The first step：OpenFOAM engineered paths are set, OpenFOAM grid file and result data files are found；
Second step：By regular expression, it is matched in OpenFOAM grid file and result data files comprising data
The expression formula of information；
Third step：By the relevance between analysis OpenFOAM grid file, result data files, OpenFOAM is established
Mapping relations between grid file, result data files, and complete the foundation of all data mapping relations；
4th step：Grammer, semanteme and the format of definition XML file；
5th step：According to the XML file grammer and format of definition as, XML lattice are write to all data for establishing mapping relations
Formula file simultaneously exports.
In the second step, regular expression is also known as regular expression, is often abbreviated as regex, regexp or RE in code,
A kind of logical formula operated to character string and spcial character, be exactly with predefined some specific characters and these
The combination of specific character forms " regular character string ", for expressing a kind of filter logic to character string.Wherein, canonical table is logical
It is often used to retrieve, replaces those texts for meeting some mode or rule.It, be according to the net of OpenFOAM in second step
The format of lattice, result data files defines " regular character string ", is matched by canonical, screen and find the use for including in file
Data information required for family.
In the third step, OpenFOAM grid file, result data files are usually separately stored in multiple files, are built
Vertical mapping relations, which refer to, finds associated data in multiple files, and stores them as set.Such as：Establish grid body
Unit-face unit-coordinate-result data mapping relations, the body unit individually stored originally and corresponding face is single
Member, point coordinate, result data set.
In 4th step, XML refers to extensible markup language, it can be used to flag data, define data type, permits
The original language that family allowable is defined the markup language of oneself.It is stored up by the grammer, semanteme and format of customized XML file
Data information of the bag deposit containing mapping relations is extracted and is transmitted convenient for data.
The present invention gives a kind of data format and its conversion for the post-processing of OpenFOAM result by above step
Method, while giving interface document and grammer corresponding to OpenFOAM heat analysis result.
Main advantages of the present invention are：For OpenFOAM Numerical Simulation Results data for post-process, secondary calculating with
Analysis provides a kind of data storage file of XML format, and this document is clear in structure, intuitive, user can be facilitated to read, and wraps
Result data corresponding to gridding information and grid all in model is contained, convenient for the extraction and transmitting of data.User Ke Gen
According to the data needed in rapidly extracting file for secondary calculating and analysis.Meanwhile the result data XML format file can be with
Interface document as OpenFOAM secondary development.
Detailed description of the invention
The OpenFOAM limited bulk analysis result data format conversion method process that Fig. 1 is post-processed towards result
Fig. 2 grid body-face-point-result data mapping relations
Fig. 3 establishes data mapping relations process
Specific embodiment
To better understand feature and advantage of the invention, below in conjunction with attached drawing, it is described in detail below：Figure
1 describes the process of this method.
User be based on OpenFOAM complete Heat transfer numerical simulation after, need to extract model grid file and corresponding temperature
Angle value is post-processed, and perhaps for secondary calculating and analysis or when carrying out secondary development, one kind of the invention is used for
The data format and its conversion method of OpenFOAM result post-processing, specific implementation step are：
The first step：According to the installation path of OpenFOAM and Heat transfer numerical simulation engineered paths, Heat transfer numerical simulation is found
The grid file and result data files of model after the completion.
Second step：The grid file and end document format data after the completion of OpenFOAM Heat transfer numerical simulation are concluded, is led to
It is as follows with format：
Grid file and Heat transfer numerical simulation destination file are only had any different in character string, and corresponding regular expressions are passed through
Formula, matching are found and are extracted in OpenFOAM grid file and result data files comprising data information.
Third step：Establish grid body unit-face unit-coordinate-temperature value of model in Heat transfer numerical simulation
Mapping relations need to extract cellZones, owner, neighbour, faces, points, T text in OpenFOAM calculated result
Data in part, the mapping relations between these files are as shown in Fig. 2, wherein the meaning of solid line is the source of data information, band
The realization of double-head arrow then indicates body unit, and face unit, point number, the mapping between point coordinate and result data (temperature value) are closed
System.
The data information extracted will be matched in second step and carries out classification set according to the mapping relations of foundation, and completes institute
There is the foundation of data mapping relations, process is as shown in Figure 3, wherein i is number, and coding rule successively establishes grid since 0
Body unit-face unit-coordinate-result data (temperature value) mapping relations, maximum number is that element number sum subtracts
One.
4th step：According to the obtained grid of Heat transfer numerical simulation, calculation result data and type, definition XML file
Grammer, semanteme and format, as follows：
5th step：Program in machine code is write according to above-mentioned flow and method, according to XML file grammer and lattice defined in the 4th step
Formula is write as XML format file to all data acquisition systems for establishing mapping relations and is exported.
It is numerical simulation knot provided by the present invention for the data format and its conversion method of the post-processing of OpenFOAM result
Fruit data are for post-processing, secondary calculating and analysis and secondary development provide a kind of data-interface file of XML format, should
File structure is clear, intuitive, easy-to-read, convenient for the extraction and transmitting of data.
Claims (4)
1. OpenFOAM limited bulk analysis result data format and its conversion method, feature towards result post-processing exist
In：It is comprised the steps of：
The first step：OpenFOAM engineered paths are set, OpenFOAM grid file and result data files are found；
Second step：By regular expression, it is matched in OpenFOAM grid file and result data files comprising data information
Expression formula；
Third step：By the relevance between analysis OpenFOAM grid file, result data files, OpenFOAM grid is established
Mapping relations between file, result data files, and complete the foundation of all data mapping relations；
4th step：Grammer, semanteme and the format of definition XML file；
5th step：According to the XML file grammer and format of definition as, XML format text is write to all data for establishing mapping relations
Part simultaneously exports.
By above step, a kind of data format and its conversion method for the post-processing of OpenFOAM result is given.
2. it is according to claim 1 towards result post-processing OpenFOAM limited bulk analysis result data format and its
Conversion method, it is characterised in that：
In the second step, the grid file and end data file lattice after the completion of OpenFOAM Heat transfer numerical simulation are concluded
Formula, by corresponding regular expression, matching is found and extracted wraps in OpenFOAM grid file and result data files
Containing data information, general format is as follows：
Grid file and Heat transfer numerical simulation destination file are only had any different in character string.
3. it is according to claim 1 towards result post-processing OpenFOAM limited bulk analysis result data format and its
Conversion method, it is characterised in that：
In the third step, by the relevance between analysis OpenFOAM grid file, result data files, establish
Mapping relations between OpenFOAM grid file, result data files, and complete the foundation of all data mapping relations.Its
In, cellZones, owner, neighbour, faces, points, T text in OpenFOAM calculated result are extracted by second step
Data in part establish grid body unit in Heat transfer numerical simulation-face unit-coordinate-number of results according to the process of Fig. 3
According to mapping relations, the body unit that all scripts are individually stored and corresponding face unit, point coordinate, result data set.
Wherein, i is number, and coding rule successively establishes grid body unit-face unit-coordinate-result data (temperature since 0
Angle value) mapping relations, maximum number be that element number sum subtracts one.
4. it is according to claim 1 towards result post-processing OpenFOAM limited bulk analysis result data format and its
Conversion method, it is characterised in that：
In 4th step, the data letter comprising mapping relations is stored by the grammer, semanteme and format of customized XML file
Breath is extracted and is transmitted convenient for data.According to the obtained grid of Heat transfer numerical simulation, calculation result data and type, XML is defined
Grammer, semanteme and the format of file, as follows：
。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113609556A (en) * | 2021-07-20 | 2021-11-05 | 国网河北省电力有限公司雄安新区供电公司 | GIM format and XDB format lossless conversion method of basic C #, and base XDB format lossless conversion method |
| CN115618653A (en) * | 2022-11-30 | 2023-01-17 | 北京云庐科技有限公司 | Method, server and program product for post-processing of simulation calculation results of CAE software |
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| CN101055578A (en) * | 2006-04-12 | 2007-10-17 | 龙搜（北京）科技有限公司 | File content dredger based on rule |
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| CN113609556A (en) * | 2021-07-20 | 2021-11-05 | 国网河北省电力有限公司雄安新区供电公司 | GIM format and XDB format lossless conversion method of basic C #, and base XDB format lossless conversion method |
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