SimScale CAE Forum

Very thin boundary layers and y+ on complex geometry


#183

I believe that is the % of cells out of the original “perfect” BL extrusion that it is going to retain after doing displacement and applying the quality metrics. You’ll see that number go down with each iteration.


#184

But I think that is just an assumption right now.

I think my calculation (sum of (faces*layers/face))/(total faces) is the correct weighted average of layers/face for all chart data.

EDIT: More research tells my gut that your new discovery is not what you think it is, more to do with individual iterations of layering process, not end result (but I could be wrong) :wink:


#185

No doubt yours is a better metric, but this one is free and fast. :money_with_wings:


#186

Can’t resist this one… maybe you get what you pay for here :rofl::rofl:


#187

@jhartung , wow this is now the 5th longest thread ever in the SimScale environment with respect to # of posts (I think) …

You deserve some sort of reward for hanging in there :wink:

I have learned a lot and I hope you do summarize what you have learned at the end here, so that those who follow may be pointed to the end post because I don’t think that a lot of others will get through the whole thing (but I know I would if I happened upon it :wink: )

If you do summarize here, please be sure to edit your 1st post with BOLD text that links to the end summary post :grinning:

But, be ready for some continuation after that summary :wink:


#188

Good idea Dale!

I think Josh wanted to write a summary anyway once he finished his studies :slight_smile:

Best,

Jousef


#189

Hey all, sorry for the radio silence. Having gotten to some results I mostly like, I had to do some work on the project actually using them. I’ll be back to transform this into a great project and post, fear not!


#190

@Get_Barried AHA, I finally found Dylans explanation that I think sortof relates to the Absolute tolerance 1e-15 and for sure, the larger relative tolerances that I use, basically for quicker convergence in steady state analysis’s :