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    icoFoam 计算不出涡

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    • 冠
      冠竹 last edited by

      使用icoFoam计算一个二维的方柱绕流,雷诺数8000。
      c0131e66-6931-4c67-8f68-d4a9946a3f26-image.png
      速度边界设置如下:

      boundaryField
      {
          INLET
          {
              type            fixedValue;
              value           uniform (0.1616 0 0);
          }
          OUTLET
          {
              type            zeroGradient;
          }
      
          wall_r
          {
              type            cyclic;
          }
      
         GRID
          {
              type            fixedValue;
              value           uniform (0 0 0);
          }
      
          wall_l
          {
              type            cyclic;
          }
      
          wall_u
          {
              type            empty;
          }
      
          wall_d
          {
              type            empty;
          }
      }
      

      感觉应该没啥问题,那不出涡的原因可能在哪呢

      OpenFOAM 入门级小学生

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      • Z
        zhouxu @冠竹 last edited by

        @冠竹 你这个是什么云图?涡应该看流线吧

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        • 冠
          冠竹 @zhouxu last edited by

          @zhouxu 这个是tecplot里Q方法算的涡量云图

          OpenFOAM 入门级小学生

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          • Z
            zhouxu @冠竹 last edited by

            @冠竹 流线是什么样的呢?Q准则可以调节Q的值

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            • 冠
              冠竹 @zhouxu last edited by

              @zhouxu 6a56d516-b6d5-40ee-9aa8-c97b9fa7564e-image.png
              流线是这样的,Q方法的已经调到0.0001了,但是还是没有出现涡结构。不知道是哪里出了问题,因为看流线就是没有涡的样子

              OpenFOAM 入门级小学生

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              • Z
                zhouxu @冠竹 last edited by

                @冠竹 有可能是入口速度太小了

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