of2006的setExprBoundaryFields似乎很好用

[Samuel-Tu]

大家有用过of2006的setExprBoundaryFields吗，可以通过expression控制边界条件，我找了一下tutorials里的文件，只有两个

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  v2006                                 |
|   \\  /    A nd           | Website:  www.openfoam.com                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      setExprBoundaryFieldsDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

pattern
{
    field   T;

    expressions
    (
        {
            patch   bottom;
            target  theta0;
            expression #{ (pos().x() < 1e-4 ? 60 : 120) #};
        }
    );

    keepPatches  true;
}

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  v2006                                 |
|   \\  /    A nd           | Website:  www.openfoam.com                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      setExprBoundaryFieldsDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

pattern
{
    field   T;

    expressions
    (
        {
            patch   outlet2;
            target  something;
            expression #{ (pos().x() < 1e-4 ? 60 : 120) #};
        }
    );
}

没啥解释，看起来有点费劲。。。target是干啥的呀。。。

[Samuel-Tu]

链接文本，研究了一下用法，大家可以看看