[CabreraLucas]

Hello, foamers


I'm having trouble adding boundary layers to my mesh. I've been tinkering with the layer controls as well as reading related threads in here, but I wasn't able to create the boundary layer. I tried attaching my sHMDict, blockMeshdict and the outputs but it didn't let me, for some reason, so I've put them on pastebin.

sHM: https://pastebin.com/BSfdWWkv
blockMesh: https://pastebin.com/ub3iKxNC
layer output: https://pastebin.com/tvAqjd3t


Does anybody know what's wrong? Thanks in advance.


Lucas

[mwaqas]

Hello Lucas,


You already have alotof cells having pyramid volume less the 1e-13. Try to use a much smaller value for pyramid volume (may be like 1e-20). Also you are using relative size false. Are you sure your mesh cell size is in the same range?


Regards

[CabreraLucas]

Hello! Thanks for the reply!

I was using "relativeSize True" before so I decided to try it the other way. My geometry is an aneurysm about 5cm long.

I tried out your suggestion and unfortunately it didn't yield any different results.

Here's the output: https://pastebin.com/theQhMTX

Also I have attached what a slice of my geometry looks like after snap, but before layers. (After I run with addLayers on i get that exact same result)


Regards,

Lucas

[mwaqas]

How is your mesh quality before adding layers with pyramid volume <1e-20. May be you can try with relative size true starting with one layer. If you like, you can upload your case here and I can try myself (I will be able to test on manday).


Regards

[CabreraLucas]

Hi,


I've uploaded my case here: https://www.dropbox.com/s/1x24dhqtig...urysm.zip?dl=0


I ran checkMesh and it didn't give me any errors. I'll try changing other settings. Thanks for the help!

[Cagatayemre]

Use default meshQualityDict for castellation and snap.
Try to use following meshQuality settings for only 'layer generation process'

maxNonOrtho 180;
maxBoundarySkewness -1;
maxInternalSkewness -1;
maxConcave 180;
minVol 0;
minTetQuality -1e30;
minArea -1;
minTwist 0.002;
minDeterminant 0.001;
minFaceWeight 0.05;
minVolRatio 0.01;
minTriangleTwist -1;