OpenFOAM三维计算结果映射到二维平面

香柏树

请问大家知道如何在OpenFOAM中将计算完成的三维结果映射到其内部的一个二维平面么？比如图1中三维线图的流场信息（754万多面体网格）如何映射到正方形平面上，这样就能通过代码单独分析该平面上的数据了。目前代码难以在三维计算域执行，而且仅适用于OF默认格式的文件，所以sample方法在此处也难以应用。
我现在尝试了方法是这样的：
1）针对正方形平面画完二维网格（厚度方向为1个网格，总网格数量8160，所有平面均建立一个part内）后，单独建立个被映射算例目录，里面包含0时刻和最新时刻的文件，system中也包含mapFieldsDict文件，文件信息如图2所示。
2）将system中controlDict中startTime 改为要映射的时刻。
3）在被映射算例目下，建立映射时刻文件夹，里面建立个组分C2H2的文件进行尝试，文件内容如图3所示。
4）输入命令：mapField <源文件目录>，运行记录和错误如下所示。
d867cb13-766a-4b93-8318-7cd6447b87fb-图片.png

log文件/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Version:  8
     \\/     M anipulation  |
\*---------------------------------------------------------------------------*/
Build  : 8
Exec   : mapFields /scratch/users/nus/e0920926/OF6/MS-TDAC
Date   : Apr 19 2022
Time   : 11:06:22
Host   : "std0120"
PID    : 13053
I/O    : uncollated
Case   : /scratch/users/nus/e0920926/OF5/CE
nProcs : 1
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 10)
allowSystemOperations : Allowing user-supplied system call operations

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Source: "/scratch/users/nus/e0920926/OF6" "MS-TDAC"
Target: "/scratch/users/nus/e0920926/OF5" "CE"

Create databases as time
--> FOAM Warning : 
    From function virtual void Foam::Time::readDict()
    in file db/Time/TimeIO.C at line 408
    Reading "/scratch/users/nus/e0920926/OF6/MS-TDAC/system/controlDict" from line 18 to line 169
    Selecting compressed binary is inefficient and ineffective, resetting to uncompressed binary
--> FOAM Warning : 
    From function virtual void Foam::Time::readDict()
    in file db/Time/TimeIO.C at line 408
    Reading "/scratch/users/nus/e0920926/OF5/CEMA/system/controlDict" from line 18 to line 155
    Selecting compressed binary is inefficient and ineffective, resetting to uncompressed binary

Source time: 0.110675
Target time: 0.110675
Create meshes

Source mesh size: 7547729	Target mesh size: 8160

--> FOAM Warning : 
    From function Foam::triFace Foam::tetIndices::faceTriIs(const Foam::polyMesh&) const
    in file meshes/polyMesh/polyMeshTetDecomposition/tetIndicesI.H at line 76
    No base point for face 41258162, 6(32185316 32185317 31764850 30956255 31547018 30861795), produces a valid tet decomposition.
--> FOAM Warning : 
    From function Foam::triFace Foam::tetIndices::faceTriIs(const Foam::polyMesh&) const
    in file meshes/polyMesh/polyMeshTetDecomposition/tetIndicesI.H at line 76
    No base point for face 41258164, 4(30956255 31764850 31416084 31554407), produces a valid tet decomposition.
--> FOAM Warning : 
    From function Foam::triFace Foam::tetIndices::faceTriIs(const Foam::polyMesh&) const
    in file meshes/polyMesh/polyMeshTetDecomposition/tetIndicesI.H at line 76
    No base point for face 41258167, 4(32569102 32165258 31326296 31085982), produces a valid tet decomposition.
--> FOAM Warning : 
    From function Foam::triFace Foam::tetIndices::faceTriIs(const Foam::polyMesh&) const
    in file meshes/polyMesh/polyMeshTetDecomposition/tetIndicesI.H at line 76
    No base point for face 41258168, 6(30957345 31326296 32165258 32289540 31184503 31851659), produces a valid tet decomposition.
--> FOAM Warning : 
    From function Foam::triFace Foam::tetIndices::faceTriIs(const Foam::polyMesh&) const
    in file meshes/polyMesh/polyMeshTetDecomposition/tetIndicesI.H at line 76
    No base point for face 5862791, 4(9594118 11818146 4123357 11818190), produces a valid tet decomposition.

Mapping fields for time 0.110675

    interpolating C2H2

err文件

--> FOAM FATAL IO ERROR: 
wrong token type - expected Scalar, found on line 24 the punctuation token ')'

file: /scratch/users/nus/e0920926/OF5/CEMA/0.110675/C2H2 at line 24.

    From function Foam::Istream& Foam::operator>>(Foam::Istream&, Foam::doubleScalar&)
    in file lnInclude/Scalar.C at line 101.

FOAM exiting

针对报错信息，修改了图3中内容好多次，依然无法消除这个错误。请问大家有什么好的解决方法么？

香柏树

三维网格结构很复杂，有12个part。目前二维网格只有一个part，和这个不完全对应有关系么？

zhouxu

@香柏树后处理软件的切片功能可以实现吧