Dear all, I am attempting to simulate a double diffusion (Natural convection+Mass transfer) problem in a square enclosure utilizing humid air in which there is a high concentration at the left wall (a thin film where the evaporation occurs) and low concentration at the right wall (cold wall where the condensation occurs) as illustrated in picture. The natural convection is due temperature difference and there is no phase change will happen? May somebody guides me if I it is possible to solve this problem in FLUENT and which model can be used at the simulations.
Thanks
Khalid
Dear Khalid B. Saleem . Of course, it is possible! Model of laminar flow. I think the speeds of fluid will not be great. This is a simple two-dimensional problem.
Its some examples.
https://www.youtube.com/watch?v=o2cFA97LDJk
https://www.youtube.com/watch?v=CjIkm_nNo8c
https://www.youtube.com/watch?v=VNH6Z0p-mxk
Dear Khalid,
Solve the conservation equations(species,mass, momentum and energy) along with gas law. Also define diffusion velocity by appropriate model.
Volodymyr many thanks for the reply and for the tutorials you sent. Actually in my geometry the fluid motion is obeying the Boussineseq approximation which mainly cause due temperature difference among boundaries. In addition to the variation on the concentration at the side walls. Hence, I want to ask how I can couple between the Boussineseq flow and the concentration variation among the walls? If you have any helpful tutorial in this topic please send me thanks.
Khalid B. Saleem I don't have a tutorial. I am so sorry. But concentration variation among the walls can be realized with User Defined Function. Maybe I find the listing of programm on C.
Dear Syed Mughees Ali thanks for the reply. Your answer is hard to apply? please give more details.
Dear Volodymyr Brazhenko why a UDF? what about species transport model? do you have an idea about it ? any useful tutorials? I appreciate your assist with that? thanks
- Badges
- Science topic