请教各位大佬关于shm画网格的问题

Noob

各位大佬好！我想请教一下为什么下面这个suboff在尖锐处和尾翼会丢失边界层，另外想请教一下可以优化控制文件的哪些部分来进行改善，感觉snap这一步尾翼附近的网格就变得不太好了，感谢各位大佬，祝各位科研顺利


/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  2.3.0                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version 2.0;
    format ascii;
    class dictionary;
    location system;
    object snappyHexMeshDict;
}

    castellatedMesh true;
    snap true;
    addLayers true;
    geometry
    {
        model.stl
        {
            type triSurfaceMesh;
            name model;
            
            patchInfo
            {
                type wall;
            }
        }
        sail 
        {
            type searchableBox;
            min (0.8 -0.1 0.19);
            max (1.4 0.1 0.47);
        }
        
        wake
        {
            type searchableBox;
            min (-0.5 -0.5 -0.5);
            max ( 6.0  0.5  0.5);
        }
        
        propeller
        {
            type searchableBox;
            min (3.6 -0.3 -0.3);
            max (4.4 0.3 0.3);

        }

    }

    castellatedMeshControls
    {
        features
        (
            {
                file "model.eMesh";
                level 1;
            }

        );
        
        refinementSurfaces
        {
            model
            {
                level (3 4);
            }

        }

        refinementRegions
        {
            sail
            {
                mode inside;
                levels ((3 4));
            }
            
            wake
            {
                mode inside;
                levels ((2 2));
            }

            propeller
            {
                mode inside;
                levels ((3 4));
            }
            
        }

        locationInMesh ( 6.0 1.0 1.0);
        maxLocalCells  10000000;
        maxGlobalCells 50000000;
        minRefinementCells 0;
        nCellsBetweenLevels 3;
        resolveFeatureAngle 30;
        allowFreeStandingZoneFaces false;
        planarAngle 30;
        maxLoadUnbalance 0.10;
    }

    snapControls
    {
        nSolveIter 300;
        nSmoothPatch 10;
        tolerance 1.5;
        nRelaxIter 10;
        nFeatureSnapIter 10;
        implicitFeatureSnap false;
        explicitFeatureSnap true;
        multiRegionFeatureSnap false;
    }

    addLayersControls
    {
        layers
        {
            "model"
            {nSurfaceLayers 8;}
        }

        relativeSizes true;
        expansionRatio 1.3;
        finalLayerThickness 0.4;
        minThickness 0.0001;
        nGrow 0;
        featureAngle 180;
        slipFeatureAngle 80;
        nRelaxIter 5;
        nSmoothSurfaceNormals 1;
        nSmoothNormals 3;
        nSmoothThickness 10;
        maxFaceThicknessRatio 0.9;
        maxThicknessToMedialRatio 0.3;
        minMedialAxisAngle 90;
        nBufferCellsNoExtrude 0;
        nLayerIter 50;
        nRelaxedIter 20;
        writeVTK false;
        noErrors false;
        layerRecovery 1;
        growZoneLayers false;
        projectGrownUp 0.0;
    }

    meshQualityControls
    {
        maxNonOrtho 65;
        maxBoundarySkewness 4;
        maxInternalSkewness 4;
        maxConcave 180;
        minFlatness 0.5;
        minVol 1.00E-13;
        minArea -1;
        minTetQuality 1e-30;
        minTwist 0.01;
        minDeterminant 0.01;
        minFaceWeight 0.01;
        minVolRatio 0.01;
        minTriangleTwist -1;
        nSmoothScale 4;
        errorReduction 0.75;
    }

    debug 0;
    mergeTolerance 1E-6;
    autoBlockMesh false;

李东岳

如果你们看openfoam自带的，也这样。不过自带的应该是只是加了一个面。SHM加边界层都是老大难了。这部分工作应该没有人赞助。Mattijs也不在基金会这么。前几年ESI那面snappyHexMesh改动的挺多，不过这也是老大难。

商软跟开源区别挺大。商软卖个几千万，团队人员咔咔咔有活就干不闲着，招过来本身就是做网格的，那就得一直开发网格。开源这面核心没几个人，不存在固定做某个分支的人，有赞助就全干这个。没赞助就靠别人贡献。有贡献就有bug提升。没贡献就没有。

OpenFOAM那个AMI之前也一直没有赞助，也没贡献，也属于老大难。后来Will过去之后，把这个给弄了。

Noob

@李东岳谢谢李老师拨冗回帖哈哈哈，那我还是去用商软画网格吧

CFD中文网

请教各位大佬关于shm画网格的问题