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Issues about adding boundary layer mesh
Posted: Thu Feb 21, 2019 3:18 pm
by lb_yuan
Hello,
I tested the new feature of adding a boundary layer mesh by subroutine CS_user_mesh-modify.c in v5.3. However, the geometry of the domain was modified as well. Does anyone have any idea about this? Thanks
Re: Issues about adding boundary layer mesh
Posted: Fri Feb 22, 2019 12:27 am
by Yvan Fournier
Hello,
Yes, this feature is still not quite complete, and does not have a true sliding condition. You can see more details about its limitations on the issue tracker on the GitHub page.
To better constrain the mesh, you can prevent deformation on some faces where no boundary layer is inserted by explicitely adding zero layers to that zone. In your case, adding zero layers to the top, bottom, and right sides might help somewhat, though I am not 100% sure it will be enough. Constraining faces closer to the insertion zone will help, but will leave a smaller sliding section, in which cells might be deformed a bit more.
In version 6.0 beta, an additional option allows blocking movement en selected vertices (useful especially if there is an internal zones whose boundaries should not move, such as a head losses zone). The CDO module now has the operator for sliding conditions, so that should come next, but might be available only in a couple of months.
Best regards,
Yvan