运行pisoFoam的时候,卡住不动了
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在HPC上运行,一开始用一个节点16个处理器运行的时候,花了12个消失得到了3.6s的数据,后来为了提高速度,就换了16个节点一共256个处理器。
运行了两次,一次在0.163秒卡住了,一次在0.17秒卡住了。没有报错,只是卡在那里不动,查看了一下各个处理器还是在满载运行。
一共有560万个单元,入口风速的边界条件是自己写的,能产生随机风俗时程,之前没有加密沿高度向的底部单元的时候,没有出现过这样的问题。
我现在觉得问题可能出现在:1.在那一个具体时间步进入死循环出不来了,可能引起的原因是不收敛了,但是那一步的courant number还是很小。2.我写的入口风速有问题。
感谢各位能提供一些信息!
如下是运行到最后时候的
Time = 0.168 Courant Number mean: 0.2252957 max: 0.3151702 Patch: inlet recycled 3 eddies mass flow correction coefficient: 1.005238 smoothSolver: Solving for Ux, Initial residual = 0.005431484, Final residual = 3.443522e-07, No Iterations 4 smoothSolver: Solving for Uz, Initial residual = 0.00986471, Final residual = 6.099746e-07, No Iterations 4 GAMG: Solving for p, Initial residual = 0.1917015, Final residual = 0.01027828, No Iterations 2 time step continuity errors : sum local = 8.542895e-07, global = 6.909716e-10, cumulative = -8.085466e-07 GAMG: Solving for p, Initial residual = 0.01235708, Final residual = 8.729178e-07, No Iterations 21 time step continuity errors : sum local = 7.655085e-11, global = -5.037762e-13, cumulative = -8.085471e-07 ExecutionTime = 440.13 s ClockTime = 426 s Time = 0.169 Courant Number mean: 0.2252872 max: 0.3151045 Patch: inlet recycled 4 eddies mass flow correction coefficient: 1.005221 smoothSolver: Solving for Ux, Initial residual = 0.004916222, Final residual = 3.063116e-07, No Iterations 4 smoothSolver: Solving for Uz, Initial residual = 0.009755776, Final residual = 6.022459e-07, No Iterations 4 GAMG: Solving for p, Initial residual = 0.1274995, Final residual = 0.008578488, No Iterations 2 time step continuity errors : sum local = 7.616146e-07, global = -1.088968e-10, cumulative = -8.08656e-07 GAMG: Solving for p, Initial residual = 0.009608369, Final residual = 8.486479e-07, No Iterations 21 time step continuity errors : sum local = 7.726608e-11, global = 7.693458e-13, cumulative = -8.086552e-07 ExecutionTime = 442.66 s ClockTime = 429 s Time = 0.17 Courant Number mean: 0.2252813 max: 0.3153122 Patch: inlet recycled 7 eddies mass flow correction coefficient: 1.00542