我打算在服务器上用fluent进行多节点并行计算,请问下该如何设置呢?:happy:
MX
帖子
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@cfd-china 就是能否给定初始场,像fluent每次在计算之前都要进行initialize那样:confused:
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请教下大家,of里能像fluent那样初始化吗?
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@cfd-china 哦,直接后处理的话要挨个打开有点麻烦呀
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@cfd-china 在decomposePar算完要进行reconstructPar时,能不能并行着重组?
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@cfd-china 就是并行用reconstructPar,可以吗?
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openfoam能否进行并行重构?:confused:
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@cfd-china 是不是跟边界条件设置有关?
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@cfd-china 六面体结构网格
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@cfd-china 在将能量方程全部评论完运行一段时间之后那个bounding k.water出现负值且时间=步长也越来越小,直至最后中断
Courant Number mean: 5.84593e-12 max: 6.24635e-05 Max Ur Courant Number = 0.501327 deltaT = 7.5759e-19 Time = 0.0558288 PIMPLE: iteration 1 MULES: Solving for alpha.air MULES: Solving for alpha.air alpha.air volume fraction = 0.000122275 Min(alpha.air) = 0 Max(alpha.air) = 1 Constructing momentum equations GAMG: Solving for p_rgh, Initial residual = 3.09857e-06, Final residual = 2.58535e-16, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 2.58534e-16, Final residual = 2.58534e-16, No Iterations 0 PIMPLE: iteration 2 MULES: Solving for alpha.air MULES: Solving for alpha.air alpha.air volume fraction = 0.000122275 Min(alpha.air) = 0 Max(alpha.air) = 1 Constructing momentum equations GAMG: Solving for p_rgh, Initial residual = 4.23432e-09, Final residual = 4.23432e-09, No Iterations 0 GAMG: Solving for p_rgh, Initial residual = 4.23432e-09, Final residual = 4.23432e-09, No Iterations 0 smoothSolver: Solving for k.air, Initial residual = 0.00272658, Final residual = 1.78882e-11, No Iterations 1 smoothSolver: Solving for k.water, Initial residual = 4.7282e-07, Final residual = 2.02625e-12, No Iterations 1 bounding k.water, min: -7.97352e+24 max: 3.96132e+22 average: -7.42132e+19 PIMPLE: not converged within 2 iterations ExecutionTime = 154112 s
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@cfd-china 好,我试试
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@cfd-china 就像这样的
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@cfd-china 是4.0版本的,就是每个时间步长迭代的最后会显示PIMPLE:not converged in 20 iterations
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@wwzhao 也一样:sad: 我发现是每个时间步长迭代完之后算法没有收敛,哪怕每个时间步长的迭代数设置为1000也没法收敛,请问下您有没有遇到过类似的情况? 是不是边界条件设置的原因?
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@cfd-china minIter 设为0 的时候,计算时间步长变得越来越小,现在量级达到-12,且还在继续地减小(时间步长设置了根据库朗数自动调节)
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@CFD中文网 谢谢
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@cfd-china 在计算一段时间之后还是停止了~这个热传递好像没有关闭。
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@CFD中文网 soga~就在下面设置值就行了是吧?但我的算例是空气和水混合的,是不是在nut.air和nut.water两个文件里揉同时设置?
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OpenFOAM 里可以设置壁面的 粗糙度吗?
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@cfd-china 好的
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能让twoPhaseEulerFoam求解过程中不进行热传递计算吗? 因为每次用twoPhaseEulerFoam时,温度都会达到绝对零度以下而终止计算, 我的课题不设计热交换,所以问下大家,twoPhaseEulerFoam在计算过程中能不进行温度计算吗?
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@cfd-china 就是在水中通入气泡,但气泡是微气泡那种
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@cfd-china 谢谢啦。 就是那个d值是吧。
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@cfd-china 请问下用这两个求解器时,在哪个文件下设置气泡的尺寸,是不是在alpha文件里?
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@李东岳 原来,twoPhaseEulerFoam 和multiPhaseEulerFoam 也不能这样设定哈?
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@cfd-china 还有个问题,请问下除了alpha文件里的设置容积率外,OpenFoam里边能不能设置空气入口出气泡的尺寸?
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@cfd-china 好的,谢谢啦
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还在算,目前其他量还算正常,这种情况下是否可以直接将其视为0?
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在用interFoam计算的过程中问什么最小气体体积分数会出现负值,以及最大体积分数出现大于1上网情况?
这是中间截取的一部分:Courant Number mean: 0.0011848202 max: 0.79909788 Interface Courant Number mean: 3.4290976e-07 max: 0.066530826 deltaT = 1.1013216e-05 Time = 0.149262 PIMPLE: iteration 1 MULES: Solving for alpha.air Phase-1 volume fraction = 0.0001310536 Min(alpha.air) = -3.4979848e-321 Max(alpha.air) = 1.0000001 MULES: Solving for alpha.air Phase-1 volume fraction = 0.00013105602 Min(alpha.air) = -3.4979848e-321 Max(alpha.air) = 1.0000001 MULES: Solving for alpha.air Phase-1 volume fraction = 0.00013105844 Min(alpha.air) = -3.4979848e-321 Max(alpha.air) = 1.0000001 MULES: Solving for alpha.air Phase-1 volume fraction = 0.00013106086 Min(alpha.air) = -3.4979848e-321 Max(alpha.air) = 1.0000001 GAMG: Solving for p_rgh, Initial residual = 0.00097251051, Final residual = 6.0905146e-06, No Iterations 3 GAMG: Solving for p_rgh, Initial residual = 5.248315e-05, Final residual = 4.7913024e-07, No Iterations 9 time step continuity errors : sum local = 5.0917792e-15, global = -7.2323843e-16, cumulative = 1.0327906e-11 GAMG: Solving for p_rgh, Initial residual = 0.00023197478, Final residual = 1.4906862e-06, No Iterations 3 GAMGPCG: Solving for p_rgh, Initial residual = 2.1478119e-05, Final residual = 8.8905223e-08, No Iterations 6 time step continuity errors : sum local = 9.4468117e-16, global = 6.1551573e-17, cumulative = 1.0327968e-11 smoothSolver: Solving for k, Initial residual = 2.4783478e-06, Final residual = 9.2173605e-10, No Iterations 1 ExecutionTime = 75355.93 s ClockTime = 80355 s
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@cfd-china 谢谢啦,:happy: 刚查了下工具书,是在fvschemes文件里设置
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请问下openfoam里怎样设置steady和transient?:happy:
fluent 多节点并行
of的初始化
of的初始化
OF里可否进行并行重构?
OF里可否进行并行重构?
OF里可否进行并行重构?
OF里可否进行并行重构?
twoPhaseEulerFoam 热传递
twoPhaseEulerFoam 热传递
twoPhaseEulerFoam 热传递
twoPhaseEulerFoam 热传递
twoPhaseEulerFoam 热传递
twoPhaseEulerFoam 热传递
twoPhaseEulerFoam 热传递
twoPhaseEulerFoam 热传递
OpenFOAM 粗糙度
twoPhaseEulerFoam 热传递
OpenFOAM 粗糙度
OpenFOAM 粗糙度
twoPhaseEulerFoam 热传递
twoPhaseEulerFoam 热传递
interFoam的问题
interFoam的问题
interFoam的问题
interFoam的问题
interFoam的问题
interFoam的问题
interFoam的问题
interFoam的问题
OpenFOAM 中的稳态与非稳态的问题
OpenFOAM 中的稳态与非稳态的问题