关于气固三相流的旁路结构残差下溢问题



  • 如题,是关于气固固三相流的一个案例,之前的反应器是圆柱形直管,没问题;之后在侧面开口干路通气体及固体A旁路通气体及固体B,出现速度残差下溢问题,问题就出在旁路这个小管子上,修改网格修改边界条件都没有效果,各位大神有没有也遇到过这样的情况?
    附几何模型84088caf-a242-4d21-a6fb-ce0dfc0fa764-image.png
    附残差图case1.1trans.jpg
    及附错误代码

    error:floating point exception
    
    Flow time = 0.00217s, time step = 217
    999783 more time steps
    
    Updating solution at time level N... done.
    
      iter  continuity       u-air      u-cold       u-hot       v-air      v-cold       v-hot       w-air      w-cold       w-hot     gt-cold      gt-hot     vf-cold      vf-hot     time/iter
    !  824 solution is converged
       824  4.4734e-05  4.3028e-06  1.6160e-15  1.5532e-16  3.7044e-06  8.4128e-16  1.8434e-17  2.6324e-06  9.2002e-16  2.2426e-17  4.2387e-04  7.7097e-04  1.3462e-05  3.1041e-05  0:06:39  200
            Stabilizing mp-x-momentum to enhance linear solver robustness.
            Stabilizing mp-y-momentum to enhance linear solver robustness.
            Stabilizing mp-z-momentum to enhance linear solver robustness.
            Stabilizing pressure correction to enhance linear solver robustness.
    
    Divergence detected in AMG solver: pressure correction        Stabilizing granular-temperature to enhance linear solver robustness.
    
    Divergence detected in AMG solver: granular-temperature        Stabilizing granular-temperature to enhance linear solver robustness.
    
    Divergence detected in AMG solver: granular-temperature        Stabilizing vof-1 to enhance linear solver robustness.
    
    Divergence detected in AMG solver: vof-1        Stabilizing vof-2 to enhance linear solver robustness.
    
    Divergence detected in AMG solver: vof-2
    Divergence detected in AMG solver: pressure correction
    Divergence detected in AMG solver: granular-temperature
    Divergence detected in AMG solver: granular-temperature
    Divergence detected in AMG solver: vof-1
    Divergence detected in AMG solver: vof-2
    Divergence detected in AMG solver: pressure correction
    Divergence detected in AMG solver: granular-temperature
    Divergence detected in AMG solver: granular-temperature
    Divergence detected in AMG solver: vof-1
    Divergence detected in AMG solver: vof-2
    Divergence detected in AMG solver: pressure correction
    Divergence detected in AMG solver: granular-temperature
    Divergence detected in AMG solver: granular-temperature
    Divergence detected in AMG solver: vof-1
    Divergence detected in AMG solver: vof-2
    Error at host: floating point exception
    
    Error at Node 1: floating point exception
    
    Error at Node 0: floating point exception
    
    Error at Node 2: floating point exception
    
    Error at Node 3: floating point exception
    
    Error: floating point exception
    Error Object: #f
    
    


  • 在600步的时候,这个时候好像发散了,你看是不是有一个残差直接消失不出现了。你这种问题可能是边界设置有问题,检查一下边界条件是否合理。 :chouchou:



  • @zhijie 谢谢您的建议,600步之前是稳态计算,600步之后是瞬态计算,边界条件我一直在做修改尝试,目前还没解决,谢谢您:xinxin3:



  • 我在做多相流稳态计算的时候,vf-vapor项残差突然变为0,然后后面就跟你这个一样了,其他残差直线下降。但是结果还是错的,温度场不符合常理。后来我检查发现边界设置错了:xinlei:


Log in to reply