SimScale CAE Forum

Electronics Cooling ; fine mesh not generating

Hi Team,

mesh is not coming fine because of which simulation is not running & also willing to understand how to maintain volume ratio below 100.Here below is the link to my project.
https://www.simscale.com/workbench/?pid=7904664095879928589&mi=spec%3Ab9395d7a-87fc-4537-840c-bcf3ed5dc242%2Cservice%3AMESHING%2Cstrategy%3A122&sh=116

Please provide your valuable help.
These are the point where I am getting bad mesh but being unable to rectify.


Thank You

Hey there!

Velocity inlet + velocity outlet is an unstable combo, not recommended, please try velocity inlet + pressure outlet.

About the mesh quality, you can try to simplify your model by removing unnecessary details, or locally refine the mesh, as suggested in this article:

Hi,

please help me out unable to refine mesh through region refinement or local refinement.


Hey there,

Were you able to run the simulation? How is the result affected by the mesh in the regions you highlight?

hi,

I have run the simulation multiple times but however it is being failed with this meshing log.
tetEdgeRatio
min: 1.0000755085514412
max: 52.63542195551188
average: 1.713649210287905
standard deviation 0.47931546577325224
median: 1.6861558112643524
99.9-th percentile: 8.023153069337855
99.99-th percentile: 16.939518949719957
99.999-th percentile: 39.86303911290474
quadMaxAngle
min: 89.88220733179155
max: 171.9186938482902
average: 99.16054270580392
standard deviation 11.83152269396508
median: 94.37829006599355
99.9-th percentile: 143.3951988573763
99.99-th percentile: 152.75791533037764
99.999-th percentile: 160.51200825695935
triMaxAngle
min: 59.99999999999999
max: 173.78817723415196
average: 79.23604953332028
standard deviation 11.176445574672162
median: 77.18722510317191
99.9-th percentile: 117.6222796570568
99.99-th percentile: 132.02710407904334
99.999-th percentile: 139.92890513302495
triMinAngle
min: 1.1325403314070073
max: 59.99999999999999
average: 44.300774061463926
standard deviation 7.593625830794654
median: 44.52442014118071
99.9-th percentile: 59.99750216578807
99.99-th percentile: 59.997502165788795
99.999-th percentile: 59.99999999999987
volumeRatio
min: 1
max: 92.5239367106628
average: 1.3652659635446445
standard deviation 0.4597487518841437
median: 1.245314851039762
99.9-th percentile: 6
99.99-th percentile: 9.886350293503241
99.999-th percentile: 22.08916124496456
tetAspectRatio
min: 1.000050347271161
max: 28.65095399969691
average: 1.521165355577781
standard deviation 0.2766357800697643
median: 1.5177943379782854
99.9-th percentile: 4.3311327068756995
99.99-th percentile: 8.255727929468426
99.999-th percentile: 16.852008519885516
nonOrthogonality
min: 0
max: 88.1372559502686
average: 16.734048922956664
standard deviation 10.592562146192725
median: 15.725195273715899
99.9-th percentile: 60.56588090989305
99.99-th percentile: 80.69898608635215
99.999-th percentile: 85.98258489733072
skewness
min: 0
max: 2.6687299769906123
average: 0.15075079936413474
standard deviation 0.12117082020451367
median: 0.12919071493498713
99.9-th percentile: 1.150213878544452
99.99-th percentile: 2.220172129196479
99.999-th percentile: 2.4805181499895497
aspectRatio
min: 0.04699041860415543
max: 28.65095399969691
average: 1.301455672620514
standard deviation 0.5600512846427674
median: 1.4573751339777106

how to go for region refinement when I am selecting the bad mesh through cartesian box it is not further ending up in refinement.

Please help me out.

Hi,

I tried refining bad mesh with refinement region but still getting this.

.

Plz help

Perhaps you need to decrease the max. length in your region refinement.

Hi,

As per your guidance I decreased the max. edged length of refinement & got good mesh but still when I run the simulation it failed. Now tell me what should I do.
here I am mentioning further details for reference.

tetEdgeRatio
min: 1.000068799599625
max: 51.65054447049058
average: 1.7091134425743362
standard deviation 0.45168891518863136
median: 1.6835096315616034
99.9-th percentile: 7.285967646258554
99.99-th percentile: 15.26163960485245
99.999-th percentile: 40.88977036413365
quadMaxAngle
min: 89.94727267282529
max: 162.45715981934455
average: 99.24435854985987
standard deviation 11.924483455807808
median: 94.39665537627484
99.9-th percentile: 143.86959109818724
99.99-th percentile: 151.0108103319885
99.999-th percentile: 158.49830399161536
triMaxAngle
min: 59.99999999999999
max: 168.04056151600068
average: 79.12005744667947
standard deviation 11.14293314211237
median: 77.04623474605255
99.9-th percentile: 117.39440419089932
99.99-th percentile: 131.37862867049103
99.999-th percentile: 138.96735219456542
triMinAngle
min: 1.1083368661823323
max: 59.99999999999999
average: 44.3614779882551
standard deviation 7.583032536235446
median: 44.59652397636483
99.9-th percentile: 59.99750216578815
99.99-th percentile: 59.997502165788795
99.999-th percentile: 59.99999999999987
volumeRatio
min: 1
max: 64.00859158338481
average: 1.3616460827497723
standard deviation 0.4451949593818196
median: 1.243475387067433
99.9-th percentile: 5.999999999999996
99.99-th percentile: 9.886350293503178
99.999-th percentile: 19.54077221452679
tetAspectRatio
min: 1.0000458687660747
max: 28.162062023632263
average: 1.5174874879050937
standard deviation 0.26504742727948066
median: 1.5149643973764555
99.9-th percentile: 3.911890996092505
99.99-th percentile: 7.613290813446806
99.999-th percentile: 17.992568859146296
nonOrthogonality
min: 0
max: 87.77824784482736
average: 16.771135625253645
standard deviation 10.562266740646983
median: 15.790828421799057
99.9-th percentile: 60.030802669627036
99.99-th percentile: 75.50767000010433
99.999-th percentile: 85.95805891086705
skewness
min: 0
max: 2.873377184104513
average: 0.1500738202898726
standard deviation 0.12092774442280972
median: 0.1288340680241132
99.9-th percentile: 1.1502138785444782
99.99-th percentile: 2.2473605515551633
99.999-th percentile: 2.4919116564154953
aspectRatio
min: 0.04659682475906506
max: 28.162062023632263
average: 1.2999989040958337
standard deviation 0.5532103767557949
median: 1.4553099712905713
99.9-th percentile: 3.5413900981082933
99.99-th percentile: 7.193038304453698
99.999-th percentile: 17.312165973568767

image simulation failed simulation run failed