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@bestucan 谢谢老师，我试试

各位大佬，最近想用OF计算固定的多体装置，由于在大域内生成的结构过于粗糙 需在小域里生成 然后用mergeMesh合并到大域里去，但是小域的边界没办法删除
请问各位大佬，有没有什么设置建议？删除边界或指定特殊的边界？

VIM这面写中文比较麻烦，总需要切换输入法，目前还没找到解决办法。

@jdzhang 你的颗粒会动么？不会动，为什么颗粒间还有距离？会动，那对着“多相流”查比对着“多孔介质”查更容易找到解决方案些。

这有一个画网格的：
https://www.bilibili.com/video/BV1eS4y1F7Wm/?vd_source=c01e8d4fff0db460c75b32e0d0191b24

这有些相关的：
https://www.researchgate.net/publication/308996206_Pore-scale_numerical_simulation_of_mud_erosion_in_the_subsea_sand-mud_alternate_layer_using_lattice_Boltzmann_method

https://ascelibrary.org/doi/10.1061/(ASCE)HY.1943-7900.0001489

0_1525756293789_捕获.JPG

什么原因？

@金石为开 请教一下，这个六自由度动网格问题，是考虑了流固耦合作用的吗？，对于没有形变的刚体，和FsiFoam的流固耦合求解有什么区别吗?

@刀尔東 在 向各位大佬请教一下网格划分的基础问题 中说：

感谢各位大佬不吝赐教。

链接: https://pan.baidu.com/s/11z9O_mzDLuqEp30mWRr5Ow?pwd=1234 提取码: 1234 复制这段内容后打开百度网盘手机App，操作更方便哦
--来自百度网盘超级会员v6的分享

以上是我的两个文件

网格文件为ENSIGHT GOLD FORMAT

各位大佬，在编译udf出现问题，为什么会出现解码失败呢，flunet不是使用UTF-8 解码，为什么会出现gbk' code，从而导致Error at host: open_udf_library: couldn't get udf_data
???????????????

UnicodeDecodeError: 'gbk' codec can't decode byte 0x8f in position 155: illegal multibyte sequence:

注：路径检查没有中文和非字符

谢谢，等我考虑考虑怎么搞哈

0_1525409588790_捕获.JPG

有没有人用OpenFOAM里面的滑移网格AMI功能的，想了解一下AMI的并行做到什么程度了？对网格面的分区划分有限制吗？可以支持任意网格并行分区吗

Unknown rhoReactionThermo type Valid rhoReactionThermo types :

参考文献
Demirdzic, I.; Peric, M., Space conservation law in finite volume calculations of fluid flow.

如果你认为动量方程增量很小，可以尝试把动量方程的松弛因子设为1，看看稳定性:duang: 好像问题不是这么简单

fluent自定义过饱和函数时应该用那个压力数据来计算？我的静压只有不到100pa，太小了

今天青年节，下午放假 :chigua:

https://link.springer.com/article/10.1007/s11440-023-01982-6 可以看下这个文章

我参考了phaseScalarTransport.C的方法，人为地乘以了alpha来区分界面

这个也不是特别的稳定。

请教各位：
目前有一个6自由度运动的sloshing两相流模型，通过udf文件给定运动速度。

需要测出壁面位置某些点的压强时程变化，以及某些区域的水位（波高）时程变化。请问该如何设置这些测点，使其与动网格区域一起运动。

Hi https://cfd-china.com/user/tidedrinker

我在使用of2306也出现类似的情况，我的波频是1.3 而且不同网格密度的相位差和衰减率有明显差异

但是我在使用最密网格（单位波高内20个网格）时，总是卡在67 迭代不出来 最终计算发散

Courant Number mean: 1.18882076445e-06 max: 7.50119780436 Interface Courant Number mean: 3.00160678714e-08 max: 3.95428576669 deltaT = 6.18380398924e-152 Time = 67.132 PIMPLE: iteration 1 Updating StokesI wave model for patch inlet smoothSolver: Solving for alpha.water, Initial residual = 5.38442986655e-09, Final residual = 5.38442986655e-09, No Iterations 0 Phase-1 volume fraction = 0.666618301469 Min(alpha.water) = -2.29205431887e-10 Max(alpha.water) = 1.00000001308 MULES: Correcting alpha.water MULES: Correcting alpha.water Phase-1 volume fraction = 0.666618301469 Min(alpha.water) = -2.29205431887e-10 Max(alpha.water) = 1.00000001308 Updating shallowWaterAbsorption wave model for patch outlet DICPBiCGStab: Solving for p_rgh, Initial residual = 0.844109801632, Final residual = 0.00558442869736, No Iterations 20 DICPBiCGStab: Solving for p_rgh, Initial residual = 0.742328538632, Final residual = 0.00717435702295, No Iterations 26 time step continuity errors : sum local = 1.13821305653e-09, global = -5.40663033957e-10, cumulative = 2.0897431155e-05 DICPBiCGStab: Solving for p_rgh, Initial residual = 0.823953322827, Final residual = 0.00800680485496, No Iterations 25 DICPBiCGStab: Solving for p_rgh, Initial residual = 0.867377012998, Final residual = 9.38111948679e-10, No Iterations 389 time step continuity errors : sum local = 9.20755023008e-16, global = 7.16963646939e-16, cumulative = 2.08974311557e-05 smoothSolver: Solving for omega, Initial residual = 7.31631987399e-08, Final residual = 4.57762864183e-11, No Iterations 1 smoothSolver: Solving for k, Initial residual = 4.39226774226e-07, Final residual = 2.03583449134e-10, No Iterations 1 ExecutionTime = 29318.96 s ClockTime = 29376 s Courant Number mean: 1.18884127695e-06 max: 7.50169136387 Interface Courant Number mean: 3.0019195664e-08 max: 3.95459850554 deltaT = 8.24321301597e-153 Time = 67.132 PIMPLE: iteration 1 Updating StokesI wave model for patch inlet smoothSolver: Solving for alpha.water, Initial residual = 5.38393271075e-09, Final residual = 5.38393271075e-09, No Iterations 0 Phase-1 volume fraction = 0.666618301469 Min(alpha.water) = -2.29205431887e-10 Max(alpha.water) = 1.00000001308 MULES: Correcting alpha.water MULES: Correcting alpha.water Phase-1 volume fraction = 0.666618301469 Min(alpha.water) = -2.29205431887e-10 Max(alpha.water) = 1.00000001308 Updating shallowWaterAbsorption wave model for patch outlet DICPBiCGStab: Solving for p_rgh, Initial residual = 0.844175076514, Final residual = 0.00539645720402, No Iterations 20 DICPBiCGStab: Solving for p_rgh, Initial residual = 0.742024848316, Final residual = 0.00733560856723, No Iterations 27 time step continuity errors : sum local = 1.16277362766e-09, global = -5.78716682763e-10, cumulative = 2.08968524391e-05 DICPBiCGStab: Solving for p_rgh, Initial residual = 0.824114713535, Final residual = 0.00803020015335, No Iterations 25 DICPBiCGStab: Solving for p_rgh, Initial residual = 0.867366339743, Final residual = 9.11722968482e-10, No Iterations 373 time step continuity errors : sum local = 8.95106772158e-16, global = -5.97636368108e-16, cumulative = 2.08968524385e-05 smoothSolver: Solving for omega, Initial residual = 7.30573956466e-08, Final residual = 4.54407875238e-11, No Iterations 1 smoothSolver: Solving for k, Initial residual = 4.38607733913e-07, Final residual = 2.03320386843e-10, No Iterations 1 ExecutionTime = 29358.38 s ClockTime = 29416 s Courant Number mean: 1.18886725019e-06 max: 7.50212848379 Interface Courant Number mean: 3.00241095746e-08 max: 3.95487860459 deltaT = 1.09878323649e-153 Time = 67.132 PIMPLE: iteration 1 Updating StokesI wave model for patch inlet smoothSolver: Solving for alpha.water, Initial residual = 5.38400281089e-09, Final residual = 5.38400281089e-09, No Iterations 0 Phase-1 volume fraction = 0.666618301469 Min(alpha.water) = -2.29205431887e-10 Max(alpha.water) = 1.00000001308 MULES: Correcting alpha.water MULES: Correcting alpha.water Phase-1 volume fraction = 0.666618301469 Min(alpha.water) = -2.29205431887e-10 Max(alpha.water) = 1.00000001308 Updating shallowWaterAbsorption wave model for patch outlet -------------------------------------------------------------------------- Primary job terminated normally, but 1 process returned a non-zero exit code. Per user-direction, the job has been aborted. -------------------------------------------------------------------------- -------------------------------------------------------------------------- mpirun detected that one or more processes exited with non-zero status, thus causing the job to be terminated. The first process to do so was: Process name: [[8254,1],7] Exit code: 145 --------------------------------------------------------------------------

在粗网格和中等网格却计算很稳定。根据https://cfd-china.com/topic/5462/mpirun-detected-that-one-or-more-processes-exited-with-non-zero-status，尝试修改了fvSolution，但依旧迭代不出来，请问您有什么解决办法吗

我们2020年发的服务器，有一些客户需要做ubuntu系统。当时我们给他们做的显卡驱动。但是这个显卡驱动经常出问题。就像啥的，就像写代码出来，总是有bug，需要经常维护。主要就是这个ubuntu内核总是自动更新。有时候还禁用不干净。所以我们2020年之后的机器，linux系统的，都不装显卡驱动。这个能装。但是客户如果没有自己维护的能力，每次找我们维护显卡驱动就太费事了。

所以linux系统，如果需要装显卡驱动，请自己装然后自己维护（就是某一天开机黑屏了，要自己重新装一下）。