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  3. snappyHex划分网格,始终无法贴合

snappyHex划分网格,始终无法贴合

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  • DY大世界D Offline
    DY大世界D Offline
    DY大世界
    wrote on last edited by
    #1

    使用snappyHexMesh对圆柱体划分网格,在圆柱体外侧始终是六面体的方体网格,并不是紧贴在圆柱体面上的贴体光滑网格,不知道是什么原因?
    1.png
    但是在OF自带的一个案例中,所得到的网格就非常好,
    6.jpg
    OF中使用了如下的代码,

    #includeEtc "caseDicts/mesh/generation/snappyHexMeshDict.cfg"
    
    castellatedMesh on;
    snap            on;
    addLayers       off;
    
    geometry
    {
        fixed.obj
        {
            type triSurfaceMesh;
            name fixed;
            regions
            {
                patch0 { name slipWall; }
                patch1 { name outlet; }
                patch2 { name inlet; }
            }
        }
        rotatingZone.obj
        {
            type triSurfaceMesh;
            name rotatingZone;
        }
    }
    
    castellatedMeshControls
    {
        features
        (
          { file "fixed.eMesh"; level 2; }
          { file "rotatingZone.eMesh"; level 4; }
        );
    
        refinementSurfaces
        {
            fixed
            {
                level       (2 2);
                patchInfo   { type wall; }
                inGroups    (fixed);
    
                regions
                {
                    patch0
                    {
                        level (2 2);
                        patchInfo { type patch; }
                    }
    
                    patch1
                    {
                        level (2 2);
                        patchInfo { type patch; }
                    }
    
                    patch2
                    {
                        level (2 2);
                        patchInfo { type patch; }
                    }
                }
            }
            rotatingZone
            {
                level       (4 4);
                faceZone    rotatingZone;
                cellZone    rotatingZone;
                cellZoneInside  inside;
            }
    
        }
    
        refinementRegions
        {
            fixed
            {
                mode inside;
                levels ((1e-5 1));
            }
            rotatingZone
            {
                mode inside;
                levels ((1e-5 4));
            }
        }
    
        locationInMesh (1e-5 -1e-2 1e-5);// Offset from (0 0 0) to avoid
                                         // coinciding with face or edge and keep
                                         // away from disk itself
    }
    

    这里是需要在几何模型中对模型的面进行重命名,然后再对面进行特征加密吗?
    为什么直接使用网格snappy就始终不可以呢?
    请老师大神们指点!感激不尽!

    七 1 Reply Last reply
  • 七 Offline
    七 Offline
    七辆战车
    replied to DY大世界 on last edited by
    #2

    @DY大世界 snappyHexMesh -overwrite,估计是这个问题

    DY大世界D 1 Reply Last reply
  • DY大世界D Offline
    DY大世界D Offline
    DY大世界
    replied to 七辆战车 on last edited by
    #3

    @七辆战车 您好,谢谢您的回答,请问overwrite是什么意思,是关于网格贴合吗,我这个是不是snap方面的问题呢,就感觉网格被移除后没有贴合到几何体上。

    F 1 Reply Last reply
  • F Offline
    F Offline
    freevector
    replied to DY大世界 on last edited by
    #4

    @DY大世界 运行snappyHexMesh命令时,后面添加 -overwrite

    DY大世界D 1 Reply Last reply
  • DY大世界D Offline
    DY大世界D Offline
    DY大世界
    replied to freevector on last edited by
    #5

    @freevector 好的,谢谢您的回复,已经进行了修改,现在的网格效果已经比较不错了。

    F 范准范 2 Replies Last reply
  • F Offline
    F Offline
    freevector
    replied to DY大世界 on last edited by
    #6

    @DY大世界 :baobao:

    1 Reply Last reply
  • 范准范 Offline
    范准范 Offline
    范准
    replied to DY大世界 on last edited by
    #7

    @DY大世界 您好,我最近也遇到了相同的问题,请问您是怎么解决的呢?我已经在snappyHexMeshDict中指定了面贴合参数

    snapControls
    {
        nSmoothPatch     5;
        nSmoothInternal  5;
        tolerance        2;
        nSolveIter     300;
        nRelaxIter       5;
        nFeatureSnapIter 10;
        implicitFeatureSnap false;
        explicitFeatureSnap true;
        multiRegionFeatureSnap false;
    }
    
    1 Reply Last reply

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