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  3. buoyantBoussinesqSimpleFoam的p_rgh收敛问题

buoyantBoussinesqSimpleFoam的p_rgh收敛问题

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  • S 离线
    S 离线
    studentTan
    写于 最后由 编辑
    #1

    各位老师好,我在使用buoyantBoussinesqSimpleFoam模拟建筑室内外风场和温度场的时候出现了其他变量的残差都在1e-5~1e-8的数量级,但是参考压力项p_rgh的残差却始终在1e-2的数量级附近,始终不降低;
    但是在相同的设置下模拟纯室外环境压力项却很快就降低并且收敛了,因此想请教各位老师这种残差是否可以认为收敛,以及这种情况是否与室内环境有关,基础知识不是特别扎实,希望得到各位老师的解答

    0fc60132-fd1e-4d8b-9178-c9c0c6872326-image.png

    1 条回复 最后回复
  • 李东岳李 在线
    李东岳李 在线
    李东岳 管理员
    写于 最后由 编辑
    #2

    压力残差确实没下去。你的残差有几条线甚至在0,看起来没有求解。

    9月CFD算法编程课: http://dyfluid.com/class.html

    需要帮助debug算例的看这个 https://cfd-china.com/topic/8018

    S 1 条回复 最后回复
  • S 离线
    S 离线
    studentTan
    在 中回复了 李东岳 最后由 编辑
    #3

    @李东岳 感谢李老师能回复我,这是我停止运算的最后十步,除了压力项,其他变量的残差都已经满足收敛了,我检查了网格质量,也调整了fvsolution中的求解参数,但是压力残差都没有明显降低

    Time = 4990
    smoothSolver:  Solving for Ux, Initial residual = 7.233429e-006, Final residual = 3.6761464e-007, No Iterations 4
    smoothSolver:  Solving for Uy, Initial residual = 1.0036594e-007, Final residual = 7.6195316e-009, No Iterations 4
    smoothSolver:  Solving for Uz, Initial residual = 1.9836684e-006, Final residual = 1.4289235e-007, No Iterations 4
    smoothSolver:  Solving for T, Initial residual = 9.9784606e-008, Final residual = 5.4717997e-009, No Iterations 2
    GAMG:  Solving for p_rgh, Initial residual = 0.048760595, Final residual = 7.6912013e-008, No Iterations 16
    GAMG:  Solving for p_rgh, Initial residual = 0.0064447279, Final residual = 8.7889068e-008, No Iterations 9
    GAMG:  Solving for p_rgh, Initial residual = 0.0016545076, Final residual = 6.8731982e-008, No Iterations 8
    GAMG:  Solving for p_rgh, Initial residual = 0.00054744395, Final residual = 4.2655291e-008, No Iterations 7
    time step continuity errors : sum local = 1.78321e-011, global = -4.4072012e-012, cumulative = 2.0925113e-006
    smoothSolver:  Solving for epsilon, Initial residual = 2.0940471e-008, Final residual = 6.8582228e-009, No Iterations 1
    smoothSolver:  Solving for k, Initial residual = 6.9163161e-006, Final residual = 2.4308046e-007, No Iterations 3
    ExecutionTime = 44137.944 s  ClockTime = 44138 s
    
    Time = 4991
    smoothSolver:  Solving for Ux, Initial residual = 7.1865202e-006, Final residual = 3.6546286e-007, No Iterations 4
    smoothSolver:  Solving for Uy, Initial residual = 1.0022746e-007, Final residual = 7.6112533e-009, No Iterations 4
    smoothSolver:  Solving for Uz, Initial residual = 1.9798887e-006, Final residual = 1.4268235e-007, No Iterations 4
    smoothSolver:  Solving for T, Initial residual = 9.9150751e-008, Final residual = 5.4598483e-009, No Iterations 2
    GAMG:  Solving for p_rgh, Initial residual = 0.048859571, Final residual = 8.2351469e-008, No Iterations 15
    GAMG:  Solving for p_rgh, Initial residual = 0.0064560323, Final residual = 7.8055547e-008, No Iterations 10
    GAMG:  Solving for p_rgh, Initial residual = 0.001635382, Final residual = 6.4162447e-008, No Iterations 8
    GAMG:  Solving for p_rgh, Initial residual = 0.00054292958, Final residual = 4.2879255e-008, No Iterations 7
    time step continuity errors : sum local = 1.7956776e-011, global = -4.1662646e-012, cumulative = 2.0925071e-006
    smoothSolver:  Solving for epsilon, Initial residual = 2.0930686e-008, Final residual = 6.8543241e-009, No Iterations 1
    smoothSolver:  Solving for k, Initial residual = 6.9096209e-006, Final residual = 2.4284505e-007, No Iterations 3
    ExecutionTime = 44147.044 s  ClockTime = 44147 s
    
    Time = 4992
    smoothSolver:  Solving for Ux, Initial residual = 7.1708364e-006, Final residual = 3.6662838e-007, No Iterations 4
    smoothSolver:  Solving for Uy, Initial residual = 1.0013341e-007, Final residual = 7.6040492e-009, No Iterations 4
    smoothSolver:  Solving for Uz, Initial residual = 1.9831977e-006, Final residual = 1.4271794e-007, No Iterations 4
    smoothSolver:  Solving for T, Initial residual = 1.0039242e-007, Final residual = 5.4923528e-009, No Iterations 2
    GAMG:  Solving for p_rgh, Initial residual = 0.048955171, Final residual = 8.5036368e-008, No Iterations 14
    GAMG:  Solving for p_rgh, Initial residual = 0.0065057841, Final residual = 6.5839808e-008, No Iterations 10
    GAMG:  Solving for p_rgh, Initial residual = 0.0016706424, Final residual = 9.6316928e-008, No Iterations 7
    GAMG:  Solving for p_rgh, Initial residual = 0.00055035444, Final residual = 3.6932045e-008, No Iterations 7
    time step continuity errors : sum local = 1.5454327e-011, global = -2.9193782e-012, cumulative = 2.0925042e-006
    smoothSolver:  Solving for epsilon, Initial residual = 2.0928424e-008, Final residual = 6.8497549e-009, No Iterations 1
    smoothSolver:  Solving for k, Initial residual = 6.9029461e-006, Final residual = 2.4261047e-007, No Iterations 3
    ExecutionTime = 44155.958 s  ClockTime = 44156 s
    
    Time = 4993
    smoothSolver:  Solving for Ux, Initial residual = 7.1807295e-006, Final residual = 3.6533182e-007, No Iterations 4
    smoothSolver:  Solving for Uy, Initial residual = 1.0005022e-007, Final residual = 7.5954768e-009, No Iterations 4
    smoothSolver:  Solving for Uz, Initial residual = 1.9810587e-006, Final residual = 1.4268353e-007, No Iterations 4
    smoothSolver:  Solving for T, Initial residual = 1.0019914e-007, Final residual = 5.4859084e-009, No Iterations 2
    GAMG:  Solving for p_rgh, Initial residual = 0.048882224, Final residual = 7.5040156e-008, No Iterations 14
    GAMG:  Solving for p_rgh, Initial residual = 0.0064747971, Final residual = 8.9067088e-008, No Iterations 9
    GAMG:  Solving for p_rgh, Initial residual = 0.0016579165, Final residual = 9.7692691e-008, No Iterations 7
    GAMG:  Solving for p_rgh, Initial residual = 0.00054446156, Final residual = 5.0967844e-008, No Iterations 7
    time step continuity errors : sum local = 2.1337693e-011, global = 5.2692914e-012, cumulative = 2.0925095e-006
    smoothSolver:  Solving for epsilon, Initial residual = 2.0904728e-008, Final residual = 6.8424398e-009, No Iterations 1
    smoothSolver:  Solving for k, Initial residual = 6.8962734e-006, Final residual = 2.4237611e-007, No Iterations 3
    ExecutionTime = 44164.696 s  ClockTime = 44164 s
    
    Time = 4994
    smoothSolver:  Solving for Ux, Initial residual = 7.1781419e-006, Final residual = 3.6518466e-007, No Iterations 4
    smoothSolver:  Solving for Uy, Initial residual = 9.9964853e-008, Final residual = 7.5875618e-009, No Iterations 4
    smoothSolver:  Solving for Uz, Initial residual = 1.978316e-006, Final residual = 1.4234906e-007, No Iterations 4
    smoothSolver:  Solving for T, Initial residual = 1.0161339e-007, Final residual = 5.4352513e-009, No Iterations 2
    GAMG:  Solving for p_rgh, Initial residual = 0.048667068, Final residual = 8.9014138e-008, No Iterations 14
    GAMG:  Solving for p_rgh, Initial residual = 0.0064787797, Final residual = 9.0019693e-008, No Iterations 9
    GAMG:  Solving for p_rgh, Initial residual = 0.0016589346, Final residual = 9.6526995e-008, No Iterations 7
    GAMG:  Solving for p_rgh, Initial residual = 0.00054657985, Final residual = 4.7414475e-008, No Iterations 7
    time step continuity errors : sum local = 1.9852339e-011, global = 5.0003838e-012, cumulative = 2.0925145e-006
    smoothSolver:  Solving for epsilon, Initial residual = 2.0882039e-008, Final residual = 6.8357426e-009, No Iterations 1
    smoothSolver:  Solving for k, Initial residual = 6.8895994e-006, Final residual = 2.4214195e-007, No Iterations 3
    ExecutionTime = 44173.643 s  ClockTime = 44173 s
    
    Time = 4995
    smoothSolver:  Solving for Ux, Initial residual = 7.1988695e-006, Final residual = 3.6488282e-007, No Iterations 4
    smoothSolver:  Solving for Uy, Initial residual = 9.9894241e-008, Final residual = 7.5806731e-009, No Iterations 4
    smoothSolver:  Solving for Uz, Initial residual = 1.9757545e-006, Final residual = 1.4219424e-007, No Iterations 4
    smoothSolver:  Solving for T, Initial residual = 1.0105864e-007, Final residual = 5.472947e-009, No Iterations 2
    GAMG:  Solving for p_rgh, Initial residual = 0.048815016, Final residual = 7.4479449e-008, No Iterations 15
    GAMG:  Solving for p_rgh, Initial residual = 0.0064435426, Final residual = 8.4632704e-008, No Iterations 9
    GAMG:  Solving for p_rgh, Initial residual = 0.0016400476, Final residual = 9.7984089e-008, No Iterations 7
    GAMG:  Solving for p_rgh, Initial residual = 0.0005370252, Final residual = 4.1300817e-008, No Iterations 7
    time step continuity errors : sum local = 1.729376e-011, global = -3.739809e-012, cumulative = 2.0925107e-006
    smoothSolver:  Solving for epsilon, Initial residual = 2.0845847e-008, Final residual = 6.8253455e-009, No Iterations 1
    smoothSolver:  Solving for k, Initial residual = 6.8829101e-006, Final residual = 2.4190757e-007, No Iterations 3
    ExecutionTime = 44182.464 s  ClockTime = 44182 s
    
    Time = 4996
    smoothSolver:  Solving for Ux, Initial residual = 7.2251185e-006, Final residual = 3.6659727e-007, No Iterations 4
    smoothSolver:  Solving for Uy, Initial residual = 9.977729e-008, Final residual = 7.5734927e-009, No Iterations 4
    smoothSolver:  Solving for Uz, Initial residual = 1.9744802e-006, Final residual = 1.4210552e-007, No Iterations 4
    smoothSolver:  Solving for T, Initial residual = 1.0021002e-007, Final residual = 5.4777451e-009, No Iterations 2
    GAMG:  Solving for p_rgh, Initial residual = 0.048848576, Final residual = 9.0835364e-008, No Iterations 15
    GAMG:  Solving for p_rgh, Initial residual = 0.0064956965, Final residual = 9.3181032e-008, No Iterations 9
    GAMG:  Solving for p_rgh, Initial residual = 0.0016677274, Final residual = 5.0333169e-008, No Iterations 8
    GAMG:  Solving for p_rgh, Initial residual = 0.00055322813, Final residual = 3.7874077e-008, No Iterations 7
    time step continuity errors : sum local = 1.586079e-011, global = 3.3637822e-012, cumulative = 2.0925141e-006
    smoothSolver:  Solving for epsilon, Initial residual = 2.0834858e-008, Final residual = 6.8214514e-009, No Iterations 1
    smoothSolver:  Solving for k, Initial residual = 6.8762542e-006, Final residual = 2.4167347e-007, No Iterations 3
    ExecutionTime = 44191.574 s  ClockTime = 44191 s
    
    Time = 4997
    smoothSolver:  Solving for Ux, Initial residual = 7.2220481e-006, Final residual = 3.6555443e-007, No Iterations 4
    smoothSolver:  Solving for Uy, Initial residual = 9.9641887e-008, Final residual = 7.5646264e-009, No Iterations 4
    smoothSolver:  Solving for Uz, Initial residual = 1.9741525e-006, Final residual = 1.4193442e-007, No Iterations 4
    smoothSolver:  Solving for T, Initial residual = 1.0012102e-007, Final residual = 5.4834951e-009, No Iterations 2
    GAMG:  Solving for p_rgh, Initial residual = 0.048638465, Final residual = 8.7952926e-008, No Iterations 15
    GAMG:  Solving for p_rgh, Initial residual = 0.0064382123, Final residual = 8.8420396e-008, No Iterations 9
    GAMG:  Solving for p_rgh, Initial residual = 0.0016327896, Final residual = 6.4290142e-008, No Iterations 8
    GAMG:  Solving for p_rgh, Initial residual = 0.00053425177, Final residual = 4.2761497e-008, No Iterations 7
    time step continuity errors : sum local = 1.7893195e-011, global = 4.6293798e-012, cumulative = 2.0925187e-006
    smoothSolver:  Solving for epsilon, Initial residual = 2.0807989e-008, Final residual = 6.814505e-009, No Iterations 1
    smoothSolver:  Solving for k, Initial residual = 6.8695997e-006, Final residual = 2.4144004e-007, No Iterations 3
    ExecutionTime = 44200.657 s  ClockTime = 44200 s
    
    Time = 4998
    smoothSolver:  Solving for Ux, Initial residual = 7.2362343e-006, Final residual = 3.6759599e-007, No Iterations 4
    smoothSolver:  Solving for Uy, Initial residual = 9.957449e-008, Final residual = 7.5574411e-009, No Iterations 4
    smoothSolver:  Solving for Uz, Initial residual = 1.971532e-006, Final residual = 1.4184581e-007, No Iterations 4
    smoothSolver:  Solving for T, Initial residual = 1.006188e-007, Final residual = 5.48537e-009, No Iterations 2
    GAMG:  Solving for p_rgh, Initial residual = 0.048599122, Final residual = 7.9373906e-008, No Iterations 15
    GAMG:  Solving for p_rgh, Initial residual = 0.0065055414, Final residual = 7.501344e-008, No Iterations 9
    GAMG:  Solving for p_rgh, Initial residual = 0.001667337, Final residual = 9.5230214e-008, No Iterations 7
    GAMG:  Solving for p_rgh, Initial residual = 0.00054859718, Final residual = 5.343925e-008, No Iterations 7
    time step continuity errors : sum local = 2.2343261e-011, global = -7.1765981e-012, cumulative = 2.0925115e-006
    smoothSolver:  Solving for epsilon, Initial residual = 2.0782929e-008, Final residual = 6.8082337e-009, No Iterations 1
    smoothSolver:  Solving for k, Initial residual = 6.8629423e-006, Final residual = 2.4120639e-007, No Iterations 3
    ExecutionTime = 44209.548 s  ClockTime = 44209 s
    
    Time = 4999
    smoothSolver:  Solving for Ux, Initial residual = 7.1951907e-006, Final residual = 3.6600862e-007, No Iterations 4
    smoothSolver:  Solving for Uy, Initial residual = 9.9451425e-008, Final residual = 7.5493994e-009, No Iterations 4
    smoothSolver:  Solving for Uz, Initial residual = 1.9690932e-006, Final residual = 1.417768e-007, No Iterations 4
    smoothSolver:  Solving for T, Initial residual = 1.0021924e-007, Final residual = 5.4097863e-009, No Iterations 2
    GAMG:  Solving for p_rgh, Initial residual = 0.048628997, Final residual = 8.3004319e-008, No Iterations 15
    GAMG:  Solving for p_rgh, Initial residual = 0.0064509348, Final residual = 6.7921003e-008, No Iterations 10
    GAMG:  Solving for p_rgh, Initial residual = 0.0016487622, Final residual = 9.6201066e-008, No Iterations 7
    GAMG:  Solving for p_rgh, Initial residual = 0.0005418543, Final residual = 4.9243831e-008, No Iterations 7
    time step continuity errors : sum local = 2.0595479e-011, global = 5.9176034e-012, cumulative = 2.0925175e-006
    smoothSolver:  Solving for epsilon, Initial residual = 2.0760675e-008, Final residual = 6.801042e-009, No Iterations 1
    smoothSolver:  Solving for k, Initial residual = 6.8562801e-006, Final residual = 2.4097267e-007, No Iterations 3
    ExecutionTime = 44218.519 s  ClockTime = 44218 s
    
    Time = 5000
    smoothSolver:  Solving for Ux, Initial residual = 7.2050494e-006, Final residual = 3.6611818e-007, No Iterations 4
    smoothSolver:  Solving for Uy, Initial residual = 9.9334711e-008, Final residual = 7.5416839e-009, No Iterations 4
    smoothSolver:  Solving for Uz, Initial residual = 1.9692799e-006, Final residual = 1.4156999e-007, No Iterations 4
    smoothSolver:  Solving for T, Initial residual = 1.0031679e-007, Final residual = 5.3952098e-009, No Iterations 2
    GAMG:  Solving for p_rgh, Initial residual = 0.048783803, Final residual = 8.0646626e-008, No Iterations 15
    GAMG:  Solving for p_rgh, Initial residual = 0.0064769595, Final residual = 8.4105854e-008, No Iterations 10
    GAMG:  Solving for p_rgh, Initial residual = 0.0016609359, Final residual = 5.4748387e-008, No Iterations 8
    GAMG:  Solving for p_rgh, Initial residual = 0.00054721711, Final residual = 4.9555668e-008, No Iterations 7
    time step continuity errors : sum local = 2.0743052e-011, global = -6.1090462e-012, cumulative = 2.0925113e-006
    smoothSolver:  Solving for epsilon, Initial residual = 2.0748765e-008, Final residual = 6.7956593e-009, No Iterations 1
    smoothSolver:  Solving for k, Initial residual = 6.8496363e-006, Final residual = 2.4073941e-007, No Iterations 3
    ExecutionTime = 44232.907 s  ClockTime = 44233 s
    
    1 条回复 最后回复
  • 李东岳李 在线
    李东岳李 在线
    李东岳 管理员
    写于 最后由 编辑
    #4

    压力是没下去。原因不知道了,需要详细debug

    9月CFD算法编程课: http://dyfluid.com/class.html

    需要帮助debug算例的看这个 https://cfd-china.com/topic/8018

    1 条回复 最后回复

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