# Boundary Layer Does Not Form - Except When Default Settings Used **URL:** \ **Category:** Project Support\ **Created:** [March 3, 2019, 2:58am UTC](https://www.simscale.com/forum/t/boundary-layer-does-not-form-except-when-default-settings-used/84582 "2019-03-03T02:58:59Z")\ **Posts on this page:** 1\ **Showing post:** 60
**Author:** ![cweisheng](https://www.simscale.com/forum/user_avatar/www.simscale.com/cweisheng/32/22803_2.png) [@cweisheng](https://www.simscale.com/forum/u/cweisheng)\ **Post date:** [April 18, 2019, 2:27pm UTC](https://www.simscale.com/forum/t/boundary-layer-does-not-form-except-when-default-settings-used/84582/60 "2019-04-18T14:27:53Z")
That sounds very smart! I guess what you are saying is to combine 2 STL files, each with 1 of the Solids… Ok, I just need to find out how to do that as I am not familiar with the process you mentioned. But thanks! Edit: - awesome. previously i was saving as binary so the file was not readable. but i saw the ascii option and that is readable (in notepad++) - so i did as i think you meant, i appended one file (with one solid) to the other (with the other solid) and renamed them - i checked them in Fusion and I do see 2 bodies - I imported them into SimScale - it was one solid but 2 i-dont-know-what (faces?) that i was able to select for meshing based on mrf and propeller. it’s meshing now… so fingers crossed. still, great hack! will update if it works. --- _[View the full topic](https://www.simscale.com/forum/t/boundary-layer-does-not-form-except-when-default-settings-used/84582)._