Rob
Forum Moderator

Check which phase the UDS and source are assigned to. Multiphase may include a domain/mixture/phase thread as part of the cell loop. Review https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v241/en/flu_udf/flu_udf_MultiphaseDEFINE.html  for some examples.Â