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    kennyadapter

    @kennyadapter

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    Latest posts made by kennyadapter

    • RE: icem帮助文档

      @cfd_fly 您好,,有时间可以再分享一下嘛?非常感谢

      posted in Meshy
      K
      kennyadapter
    • RE: 刚性翼型升阻力系数的大波动问题

      请问您解决了吗
      我的数据也波动很大

      posted in OpenFOAM
      K
      kennyadapter
    • RE: 200万网格管道流qDNS并行算力测试

      @东岳 在 200万网格管道流qDNS并行算力测试 中说:

      东岳老师,那怎么调整带宽呢?有什么方法,或者需要更换什么配件吗?

      posted in OpenFOAM
      K
      kennyadapter
    • RE: 200万网格管道流qDNS并行算力测试

      @东岳
      这是我44核心的log文件的最后几个时间步:之前的迭代次数也差不多:

      
      Time = 9.8
      
      Courant Number mean: 0.733368 max: 1.27353
      GAMG:  Solving for p, Initial residual = 0.0998056, Final residual = 0.00082233, No Iterations 6
      time step continuity errors : sum local = 4.80691e-07, global = 1.99762e-20, cumulative = 1.59798e-17
      Pressure gradient source: uncorrected Ubar = 0.1335, pressure gradient = 0.000123775
      GAMG:  Solving for p, Initial residual = 0.0809999, Final residual = 0.000584259, No Iterations 6
      time step continuity errors : sum local = 3.45394e-07, global = 5.63939e-20, cumulative = 1.60362e-17
      Pressure gradient source: uncorrected Ubar = 0.1335, pressure gradient = 0.000120435
      GAMG:  Solving for p, Initial residual = 0.0189678, Final residual = 9.4483e-07, No Iterations 39
      time step continuity errors : sum local = 5.51633e-10, global = 3.45318e-20, cumulative = 1.60707e-17
      Pressure gradient source: uncorrected Ubar = 0.1335, pressure gradient = 0.000119638
      ExecutionTime = 170.51 s  ClockTime = 171 s
      
      Time = 9.9
      
      Courant Number mean: 0.73339 max: 1.27886
      GAMG:  Solving for p, Initial residual = 0.100098, Final residual = 0.000824461, No Iterations 6
      time step continuity errors : sum local = 4.82558e-07, global = 8.66441e-20, cumulative = 1.61574e-17
      Pressure gradient source: uncorrected Ubar = 0.1335, pressure gradient = 0.000123823
      GAMG:  Solving for p, Initial residual = 0.0809731, Final residual = 0.000577791, No Iterations 6
      time step continuity errors : sum local = 3.42103e-07, global = 4.07868e-20, cumulative = 1.61981e-17
      Pressure gradient source: uncorrected Ubar = 0.1335, pressure gradient = 0.000120471
      GAMG:  Solving for p, Initial residual = 0.0189619, Final residual = 9.31189e-07, No Iterations 39
      time step continuity errors : sum local = 5.44568e-10, global = 7.2382e-20, cumulative = 1.62705e-17
      Pressure gradient source: uncorrected Ubar = 0.1335, pressure gradient = 0.000119674
      ExecutionTime = 172.22 s  ClockTime = 172 s
      
      Time = 10
      
      Courant Number mean: 0.733413 max: 1.27933
      GAMG:  Solving for p, Initial residual = 0.0999699, Final residual = 0.000818608, No Iterations 6
      time step continuity errors : sum local = 4.79761e-07, global = 8.13808e-20, cumulative = 1.63519e-17
      Pressure gradient source: uncorrected Ubar = 0.1335, pressure gradient = 0.00012387
      GAMG:  Solving for p, Initial residual = 0.081007, Final residual = 0.000576888, No Iterations 6
      time step continuity errors : sum local = 3.41793e-07, global = 5.45899e-20, cumulative = 1.64065e-17
      Pressure gradient source: uncorrected Ubar = 0.1335, pressure gradient = 0.000120508
      GAMG:  Solving for p, Initial residual = 0.0189675, Final residual = 9.02577e-07, No Iterations 39
      time step continuity errors : sum local = 5.28191e-10, global = 1.77208e-20, cumulative = 1.64242e-17
      Pressure gradient source: uncorrected Ubar = 0.1335, pressure gradient = 0.00011971
      ExecutionTime = 173.99 s  ClockTime = 174 s
      
      End
      
      

      这是我32核心的:

      
      Time = 9.8
      
      Courant Number mean: 0.733369 max: 1.27363
      GAMG:  Solving for p, Initial residual = 0.0998053, Final residual = 0.000728134, No Iterations 6
      time step continuity errors : sum local = 4.26347e-07, global = 1.16708e-20, cumulative = 5.86486e-18
      Pressure gradient source: uncorrected Ubar = 0.1335, pressure gradient = 0.000123776
      GAMG:  Solving for p, Initial residual = 0.0810209, Final residual = 0.00054928, No Iterations 6
      time step continuity errors : sum local = 3.24835e-07, global = 4.55333e-20, cumulative = 5.9104e-18
      Pressure gradient source: uncorrected Ubar = 0.1335, pressure gradient = 0.000120434
      GAMG:  Solving for p, Initial residual = 0.0189497, Final residual = 8.88034e-07, No Iterations 38
      time step continuity errors : sum local = 5.18253e-10, global = 2.24608e-20, cumulative = 5.93286e-18
      Pressure gradient source: uncorrected Ubar = 0.1335, pressure gradient = 0.000119638
      ExecutionTime = 167.35 s  ClockTime = 167 s
      
      Time = 9.9
      
      Courant Number mean: 0.73339 max: 1.27894
      GAMG:  Solving for p, Initial residual = 0.100093, Final residual = 0.00073128, No Iterations 6
      time step continuity errors : sum local = 4.28756e-07, global = 1.40838e-20, cumulative = 5.94694e-18
      Pressure gradient source: uncorrected Ubar = 0.1335, pressure gradient = 0.000123823
      GAMG:  Solving for p, Initial residual = 0.0809929, Final residual = 0.000542798, No Iterations 6
      time step continuity errors : sum local = 3.21522e-07, global = -2.66223e-20, cumulative = 5.92032e-18
      Pressure gradient source: uncorrected Ubar = 0.1335, pressure gradient = 0.000120471
      GAMG:  Solving for p, Initial residual = 0.0189464, Final residual = 8.9418e-07, No Iterations 38
      time step continuity errors : sum local = 5.22767e-10, global = 2.26167e-20, cumulative = 5.94294e-18
      Pressure gradient source: uncorrected Ubar = 0.1335, pressure gradient = 0.000119674
      ExecutionTime = 169.06 s  ClockTime = 169 s
      
      Time = 10
      
      Courant Number mean: 0.733413 max: 1.27934
      GAMG:  Solving for p, Initial residual = 0.0999826, Final residual = 0.000732193, No Iterations 6
      time step continuity errors : sum local = 4.29802e-07, global = 1.57268e-20, cumulative = 5.95866e-18
      Pressure gradient source: uncorrected Ubar = 0.1335, pressure gradient = 0.00012387
      GAMG:  Solving for p, Initial residual = 0.0810305, Final residual = 0.00054485, No Iterations 6
      time step continuity errors : sum local = 3.22957e-07, global = 2.11478e-20, cumulative = 5.97981e-18
      Pressure gradient source: uncorrected Ubar = 0.1335, pressure gradient = 0.000120508
      GAMG:  Solving for p, Initial residual = 0.0189583, Final residual = 8.97181e-07, No Iterations 38
      time step continuity errors : sum local = 5.24979e-10, global = 2.66036e-20, cumulative = 6.00642e-18
      Pressure gradient source: uncorrected Ubar = 0.1335, pressure gradient = 0.00011971
      ExecutionTime = 170.82 s  ClockTime = 171 s
      
      End
      
      posted in OpenFOAM
      K
      kennyadapter
    • RE: 200万网格管道流qDNS并行算力测试
      CPU型号:E5-2699 v4
      系统:linux
      OpenFOAM版本:OpenFOAM-1906
      44 173.99
      32 170.82
      16 193.78
      8 194.74
      4 313.11
      2 585.66
      1 1146.46
      
      

      为什么我的44核心会更慢呢,东岳老师?我最近在算一个200w网格的overset算例,算了半个多月了,算的还是很慢,有什么更好的解决方法吗?@东岳

      posted in OpenFOAM
      K
      kennyadapter
    • RE: OpenFOAM重叠网格

      @netbuger 在clip中clip type选择scalar然后在下面选择CELLtype,,调整为1就行

      posted in OpenFOAM
      K
      kennyadapter
    • RE: OpenFOAM重叠网格

      @VamosZhi 如果是2D的话是要extrudemesh一下,不过要注意下方向和起始面。我一开始也遇到过这个问题,试着改一下

      flipNormals true;
      

      这个参数,这个跟方向有关系,如果不行

      sourcePatches (front);
      exposedPatchName Back;
      

      尝试改一下这两个,,换一下顺序

      posted in OpenFOAM
      K
      kennyadapter
    • 关于结构入水的问题有些疑问

      各位老师们好,我最近使用OpenFOAM做楔形自由落体入水,OpenFOAM版本是 1906。我通过修改overInterDyMFoam例子中floatingBody案例将一个方块自由落体进入水中,发现可以计算,然后我将方块通过snappyHexMesh换为楔形,发现在计算到一半就发散了。
      发散前后的速度场如图所示:
      65d876a7-72d1-4ba3-b893-bed1af5731d3-image.png

      与论文的速度对比图:9bbdc124-23a5-438c-adef-9c534082b8fe-image.png
      我尝试使用blockMesh自己画楔形结果也是在某一处发散。
      两个楔形网格如图所示:
      2a0cc4e0-d3fe-413f-907d-79c4ef192d34-image.png

      
      motionSolverLibs    ("libsixDoFRigidBodyMotion.so");
      
      dynamicFvMesh       dynamicOversetFvMesh;
      
      solver          sixDoFRigidBodyMotion;
      
      sixDoFRigidBodyMotionCoeffs
      {
      
          patches         (floatingObject);
          innerDistance   100.0;
          outerDistance   101.0;
      
          centreOfMass    (3 1.5 1.2);
      	momentOfInertia (40 921 921);
      
          // Density of the solid
          rhoSolid        466.7;
      
          // Cuboid mass
          mass           94.08;
      
      velocity (0 0 -6.5788);
          report          on;
          accelerationRelaxation 0.6;
          accelerationDamping    0.9;
      
          solver
          {
              type Newmark;
          }
      
          constraints
          {
      
              /*
              fixedPoint
              {
                   sixDoFRigidBodyMotionConstraint point;
                   centreOfRotation (0.5 0.45 0.1);
              }
             */
      
              fixedLine
              {
                  sixDoFRigidBodyMotionConstraint line;
                  //centreOfRotation (0.5 0.45 0.1);
                  direction (0 0 1);
              }
               fixedorentation
               {
                  sixDoFRigidBodyMotionConstraint orientation;
                   centreOfRotation (0.5 0.45 0.1);
               }
      /*
              fixedAxis
              {
                  sixDoFRigidBodyMotionConstraint axis;
                  axis (0 1 0);
              }
              */
          }
      }
      
      

      这是我动网格的代码,也尝试改过

      accelerationRelaxation
      

      数值,但是效果也不明显,希望各位老师给出一些建议,非常感谢!

      posted in OpenFOAM
      K
      kennyadapter
    • RE: OpenFOAM重叠网格

      @wwzhao 谢谢您的回复!

      posted in OpenFOAM
      K
      kennyadapter
    • RE: OpenFOAM重叠网格

      @wwzhao 老师方便的话能加一下QQ讨论么,我的QQ号码:1219854212,非常感谢您

      posted in OpenFOAM
      K
      kennyadapter