CFD中文网

谢谢，那个我也看了（但没仔细看，只是特意找了扩散项）。应该也是和Menon一样的结论。因为Menon的文章截图比较方便，才引用他的

@李东岳 ::146: 谢谢东岳大神

@李东岳 居然和我方向那么像，流化床和燃烧机理。

@李东岳 对 有

386b6db0-5254-4f1c-917a-606c2fa41539-image.png
377452dc-2a13-489e-b437-19f5411e4443-image.png
1、图中是fluent2019R1版本，湍流模型选择为transition SST k-w模型，保持默认参数，Re_thetac,Re_thetat,F_length等参数取值均为none；
2、但是在fluent理论手册中转捩模型与SST模型耦合明确要用到Re_thetac这个参数，如果保持默认none，那么这个参数是有个默认值吗？还是有其他的处理方法。
恳请各位前辈指点，十分感谢。

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

有大佬知道是什么原因么

@李东岳 车灯热分析。

0_1481532599819_7447183924@chatroom_1481532220845_75.png
AeroFoam: an accurate inviscid compressible solver for aerodynamic applications

@李东岳 我试了一下，可以的，是我想要的结果。谢谢东岳老师！

@Wayne

显性方法中要求 $\frac{\Gamma \Delta t}{\rho (\Delta x)^2}<0.5$，以及苦郎树小于1. 如果你的例子库朗数很低。那满足第一个条件即可。

参见：M. Peric，143页。

休斯顿市区内150平米loft卖15万美元：https://www.zillow.com/homes/for_sale/Houston-TX/pmf,pf_pt/39051_rid/globalrelevanceex_sort/29.893043,-95.053368,29.656432,-95.539513_rect/10_zm/

glgoo，我一直在用的

在外加压力下（1.0 MPa）水进入螺旋文丘里管内，在喉部流速增大，压力降低，使液体组分中溶解空气的析出，不过由于喉部管径长度都远比空化管的大，所以压力降低至饱和蒸汽压以上。目前找到比较多空化的学习资料，但是这个由于压力没有降到饱和蒸汽压以下，所以溶解在水中的气体通过溶解气浓度差析出而不是空化的相变。网上找到的相关资料比较少，请问下有人知道这种情况在多相流模型这部分怎么设置吗（所用物理模型如图所示）。4944e90f4e8663cccb56c7acc73b26b.png

回复: 动网格的旋转运动可以修改旋转轴吗？

你好 我最近也在研究dynamicMeshDict (https://openfoamwiki.net/index.php/DynamicMeshDict). CofG指的是centre of gravity. 在dynamicMeshDict你可以修改 centre of mass, inertia and etc. CofR是centre of rotation,这个我的算例是在controlDict里修改，我用的是interFoam solver，openfoam version7.

0_1478308139674_QQ图片20161105090838.png
公式18分行了还是显示不下。
大家都怎么处理的？用的是latex

目前是在用重叠网格进行模拟，一个结构是固体，另一个是线弹性。用的是明渠造波，初始化总是崩溃，这是为什么呢？报错代码附在下面，感谢各位大佬抽出时间回答这个问题。
Grouping and repartitioning the fluid cell zones...

14 Stored Partitions:
P Cells I-Cells Cell Ratio Faces I-Faces Face Ratio Neighbors Load
0 52115 3581 0.069 176927 7246 0.041 5 1
1 52472 4620 0.088 162295 4236 0.026 4 1
2 54617 12093 0.221 134005 7412 0.055 9 1
3 52637 6006 0.114 169686 5664 0.033 4 1
4 52807 11023 0.209 167910 5289 0.031 6 1
5 52057 3479 0.067 162444 4597 0.028 5 1
6 52745 1693 0.032 170269 3362 0.020 2 1
7 52784 13211 0.250 163205 4296 0.026 5 1
8 52259 3566 0.068 176157 7128 0.040 5 1
9 51910 1672 0.032 160241 2070 0.013 1 1
10 51748 3480 0.067 164291 5004 0.030 3 1
11 54525 9324 0.171 134306 6166 0.046 8 1
12 51710 3562 0.069 166038 5640 0.034 4 1
13 54297 9707 0.179 133333 6836 0.051 9 1

Collective Partition Statistics: Minimum Maximum Total

Cell count 51710 54617 738683
Mean cell count deviation -2.0% 3.5%
Partition boundary cell count 1672 13211 87017
Partition boundary cell count ratio 3.2% 25.0% 11.8%

Face count 133333 176927 2200909
Mean face count deviation -16.7% 10.5%
Partition boundary face count 2070 7412 40198
Partition boundary face count ratio 1.3% 5.5% 1.8%

Partition neighbor count 1 9

Partition Method Metis
Stored Partition Count 14

Overset partition statistics:
P Cells Solve-cells Dead-cells
0 52115 58811 0
1 52472 52274 66
2 54617 56753 617
3 52637 54720 391
4 52807 46085 6296
5 52057 52626 0
6 52745 55832 0
7 52784 43070 6359
8 52259 58396 0
9 51910 51910 0
10 51748 53430 0
11 54525 59651 261
12 51710 54199 0
13 54297 58997 228

Overset Partition Statistics: Minimum Maximum Total

Cell count 51710 54617 738683
Mean cell count deviation -2.0% 3.5%

Solve cell count 43070 59651 756754
Mean solve cell count deviation -20.3% 10.4%

Dead cell count 0 6359 14218
Mean dead cell count deviation -100.0% 526.1%

Partition Method Metis
Stored Partition Count 14

Done.

10422 partition interfaces of the 215044 cells aspect ratio > 5 545456 groups for partitioning (including overlaps) Merging groups across partitions: 1 99888 2 8996 3 2718 4 599 5 112 6 20 7 2 8 0 Partition 535235 groups out of 738683 cells 183 partition interfaces of the 215044 cells aspect ratio > 5

Grouping and repartitioning the solid cell zones...

14 Stored Partitions:
P Cells I-Cells Cell Ratio Faces I-Faces Face Ratio Neighbors Load
0 3081 778 0.253 163329 1521 0.009 4 1
1 3081 814 0.264 163934 1432 0.009 5 1
2 3089 845 0.274 129565 7700 0.059 11 1
3 3076 819 0.266 164712 1583 0.010 3 1
4 3080 832 0.270 164935 1464 0.009 6 1
5 3079 829 0.269 162882 1455 0.009 6 1
6 3077 1026 0.333 163326 1996 0.012 7 1
7 3089 795 0.257 165081 1535 0.009 4 1
8 3092 928 0.300 163821 1637 0.010 5 1
9 3093 884 0.286 160599 1611 0.010 5 1
10 3090 761 0.246 161874 1493 0.009 4 1
11 3075 806 0.262 127548 7289 0.057 9 1
12 3097 868 0.280 162126 1544 0.010 5 1
13 3098 319 0.103 126305 4986 0.039 6 1

Collective Partition Statistics: Minimum Maximum Total

Cell count 3075 3098 43197
Mean cell count deviation -0.3% 0.4%
Partition boundary cell count 319 1026 11304
Partition boundary cell count ratio 10.3% 33.3% 26.2%

Face count 126305 165081 2133715
Mean face count deviation -18.9% 6.0%
Partition boundary face count 1432 7700 46322
Partition boundary face count ratio 0.9% 5.9% 2.2%

Partition neighbor count 3 11

Partition Method Metis
Stored Partition Count 14

Overset partition statistics:
P Cells Solve-cells Dead-cells
0 3081 55196 0
1 3081 55355 66
2 3089 54741 617
3 3076 54989 391
4 3080 47373 6296
5 3079 55136 0
6 3077 55822 0
7 3089 46159 6359
8 3092 55351 0
9 3093 55003 0
10 3090 54838 0
11 3075 56138 261
12 3097 54807 0
13 3098 55846 228

Overset Partition Statistics: Minimum Maximum Total

Cell count 3075 3098 43197
Mean cell count deviation -0.3% 0.4%

Solve cell count 46159 56138 756754
Mean solve cell count deviation -14.6% 3.9%

Dead cell count 0 6359 14218
Mean dead cell count deviation -100.0% 526.1%

Partition Method Metis
Stored Partition Count 14

Done.

42 partition interfaces of the 1073 cells aspect ratio > 5 43150 groups for partitioning (including overlaps) Merging groups across partitions: 1 6 2 0 Partition 43147 groups out of 43197 cells *** Subcommunicators recreated (11/14)! *** 565 partition interfaces of the 1073 cells aspect ratio > 5 Migrating partitions to compute-nodes.

Node 1: Process 14244: Received signal SIGSEGV.

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Node 13: Process 4932: Received signal SIGSEGV.

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Node 5: Process 7224: Received signal SIGSEGV.

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Node 11: Process 8716: Received signal SIGSEGV.

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Node 7: Process 6588: Received signal SIGSEGV.

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Node 8: Process 5632: Received signal SIGSEGV.

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Node 9: Process 7040: Received signal SIGSEGV.

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Node 10: Process 3868: Received signal SIGSEGV.

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Node 6: Process 4756: Received signal SIGSEGV.

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Node 4: Process 820: Received signal SIGSEGV.

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===================================================================================
= BAD TERMINATION OF ONE OF YOUR APPLICATION PROCESSES
= RANK 0 PID 13864 RUNNING AT DESKTOP-RDMJC80
= EXIT STATUS: -1 (ffffffff) ===================================================================================
= BAD TERMINATION OF ONE OF YOUR APPLICATION PROCESSES
= RANK 2 PID 12200 RUNNING AT DESKTOP-RDMJC80
= EXIT STATUS: -1 (ffffffff)

The fl process could not be started.

c5d22161824fe807dce238e5e8352e14

谢谢老师~~