Stop diffusion through a reaction surface wall

- July 18, 2022 at 6:42 pm
  
  zdfrankman
  Subscriber
  
  I have found that enabling the species transport wall surface reaction permits diffusion of species across the reaction wall. Is there any way to have both zero diffusive flux and a wall reaction?
- July 26, 2022 at 2:45 pm
  
  RK
  Ansys Employee
  
  Hello,
  What is your end goal, why do you want to do this?
  - July 28, 2022 at 5:04 pm
    
    zdfrankman
    Subscriber
    
    I am simulating slow flow through a channel, where diffusion is dominant over convection. In this instance, O2 is reacting with a site surface catalyst to form N2. I would like to see a steady buildup of N2 and a steady loss of O2, but instead the N2 and O2 are rapidly diffusing through the reaction wall. I suspect this is because there is no specification of zero-flux through the wall.
  - August 3, 2022 at 9:14 pm
    
    zdfrankman
    Subscriber
    
    Is there any way to prevent diffusion through a reaction surface wall?