how to apply concentration on a wall

- November 10, 2023 at 1:50 am
  
  kartikeya parmar
  Subscriber
  
  i have a rectangular channel with water as inlet on the top wall i want to apply a dye like fluid and see how dye mixes with fluid as it passes but i am not getting how to apply dye concentration on the wall can anyone please help. Just like we apply temperature on a wall can we similarly apply concentration also on a wall please suggest
- November 14, 2023 at 3:51 pm
  
  Rob
  Forum Moderator
  
  It's not quite that easy at the moment. If you turn on species there's a specified value (from memory) but it's often that we'd use a source term into the near wall cell. There's an enhancement request in for the feature, but I have no knowledge as to when it'll happen.
- November 14, 2023 at 4:15 pm
  
  Ahmed Hussien
  Ansys Employee
  
  You can refer to Section “7.4.15.6 Species Boundary Conditions for Walls” in the Ansys User Guide for more infromation.
  https://ansyshelp.ansys.com/Views/Secured/corp/v232/en/flu_ug/flu_ug_bcs_sec_bound_cond.html#flu_ug_sec_changes_wallspecies.