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  3. icoFoam 计算不出涡

icoFoam 计算不出涡

Scheduled Pinned Locked Moved OpenFOAM
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  • 冠 Offline
    冠 Offline
    冠竹
    wrote on last edited by
    #1

    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

    Z 1 Reply Last reply
  • Z Offline
    Z Offline
    zhouxu
    replied to 冠竹 on last edited by
    #2

    @冠竹 你这个是什么云图?涡应该看流线吧

    冠 1 Reply Last reply
  • 冠 Offline
    冠 Offline
    冠竹
    replied to zhouxu on last edited by
    #3

    @zhouxu 这个是tecplot里Q方法算的涡量云图

    OpenFOAM 入门级小学生

    Z 1 Reply Last reply
  • Z Offline
    Z Offline
    zhouxu
    replied to 冠竹 on last edited by
    #4

    @冠竹 流线是什么样的呢?Q准则可以调节Q的值

    冠 1 Reply Last reply
  • 冠 Offline
    冠 Offline
    冠竹
    replied to zhouxu on last edited by
    #5

    @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

    Z 1 Reply Last reply
  • Z Offline
    Z Offline
    zhouxu
    replied to 冠竹 on last edited by
    #6

    @冠竹 有可能是入口速度太小了

    1 Reply Last reply

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