peteroznewman
Subscriber
There is a section in ANSYS Help describing a boundary type interior. Open ANSYS Help then Copy/Paste the URL below into the address bar of the Browser running ANSYS Help.
https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v212/en/flu_ug/tgd_user_bnd_manage.html

https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v212/en/flu_ug/flu_ug_boundary_conditions_task_page.html