动网格和overset物体速度快速震荡导致崩溃的问题
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多谢@东岳老师,我把动网格和overset的案例文件都上传了,您看一下。
动网格我是用的waves2foam+v1712的组合 overset用的1906的版本
overset: oversetMesh.zip
动网格: dynamicMesh.zip
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各位,
我尝试增大PIMPLE里面循环次数来增加p_rgh的迭代次数,但是发现每次迭代的次数还是很多 不是一个递减的趋势
如下:DILUPBiCGStab: Solving for p_rgh, Initial residual = 8.72710724614e-07, Final residual = 8.72514217379e-09, No Iterations 382 time step continuity errors : sum local = 7.03336340027e-09, global = 1.9150124018e-09, cumulative = 3.04929773866e-07 DILUPBiCGStab: Solving for p_rgh, Initial residual = 3.69104939702e-07, Final residual = 1.44876414351e-09, No Iterations 335 time step continuity errors : sum local = 1.11124908301e-09, global = 1.95050292461e-10, cumulative = 3.05124824159e-07 DILUPBiCGStab: Solving for p_rgh, Initial residual = 2.2782727071e-07, Final residual = 1.06023228234e-09, No Iterations 607 time step continuity errors : sum local = 7.68585702259e-10, global = -3.36686161497e-10, cumulative = 3.04788137997e-07 DILUPBiCGStab: Solving for p_rgh, Initial residual = 1.47947887396e-07, Final residual = 9.72671115058e-10, No Iterations 464 time step continuity errors : sum local = 6.73366904995e-10, global = 7.62059709157e-11, cumulative = 3.04864343968e-07 smoothSolver: Solving for epsilon, Initial residual = 0.000146170038677, Final residual = 5.6866402182e-09, No Iterations 8 smoothSolver: Solving for k, Initial residual = 0.00238502525139, Final residual = 9.25193944196e-09, No Iterations 20 ExecutionTime = 689.06 s ClockTime = 695 s
尝试修改为层流之后,连续迭代,次数基本成一个下降趋势,但是受力情况还是不变,错误依旧
如下:
Updating StokesII wave model for patch inlet DILUPBiCGStab: Solving for p_rgh, Initial residual = 1.33810842593e-07, Final residual = 1.05803239609e-09, No Iterations 95 time step continuity errors : sum local = 2.20723157353e-08, global = 6.73895228141e-09, cumulative = 7.30414848751e-06 DILUPBiCGStab: Solving for p_rgh, Initial residual = 8.58642796578e-09, Final residual = 9.05674029848e-10, No Iterations 23 time step continuity errors : sum local = 1.87310827339e-08, global = 5.04129159013e-09, cumulative = 7.3091897791e-06 DILUPBiCGStab: Solving for p_rgh, Initial residual = 1.88155187954e-09, Final residual = 9.84985998753e-10, No Iterations 1 time step continuity errors : sum local = 1.99973561049e-08, global = 4.66563789626e-09, cumulative = 7.313855417e-06 DILUPBiCGStab: Solving for p_rgh, Initial residual = 1.11812493747e-09, Final residual = 9.39334225107e-10, No Iterations 1 time step continuity errors : sum local = 1.91664654171e-08, global = 4.75521938246e-09, cumulative = 7.31861063638e-06 ExecutionTime = 8152.77 s ClockTime = 8159 s