本文移植自博主以前的新浪博客，原文发表于 (2014-12-25 09:58:12)。

想要实现 refineMesh, system 文件夹下需要两个文件，topoSetDict 和 refineMeshDict。
如下：

/*--------------------------------*- C++ -*----------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Version:  7
     \\/     M anipulation  |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      topoSetDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

actions
(
    {
        name    c0;
        type    cellSet;
        action  new;
        source  boxToCell;
        sourceInfo
        {
            box (-1 -1 -1) (1 1 1); // Edit box bounds as required
        }
    }
);

// ************************************************************************* //

/*--------------------------------*- C++ -*----------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Version:  7
     \\/     M anipulation  |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      refineMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

set             c0;

coordinateSystem global;

globalCoeffs
{
    tan1            (1 0 0);
    tan2            (0 1 0);
}

directions // comment out as required
(
    tan1
    tan2
    normal
);

useHexTopology  no;

geometricCut    yes;

writeMesh       no;

// ************************************************************************* //

按如下指令操作：

blockMesh
topoSet
refineMesh -dict ./system/refineMeshDict -overwrite
checkMesh

如果需要再次细化：

topoSet
refineMesh -dict ./system/refineMeshDict -overwrite
checkMesh

当年对 OF 了解不够，现在才发现 OF 早已提供了相关配置文件：
https://github.com/OpenFOAM/OpenFOAM-dev/tree/master/etc/caseDicts/mesh/manipulation/refineRegion