Modelling of gas absorption

- April 19, 2022 at 1:32 pm
  
  snr1
  Subscriber
  
  I am modelling gas absorption in a liquid. How to model the interphase mass transfer (i.e. species mass transfer) in Fluent between gas and liquid? What are the models available VOF multiphase model in Fluent to do so? Kindly suggest any tutorial for this gas absorption. In the numerical domain (Stepped cylinder: Nozzle and cylinder), the gas enters the domain via a nozzle located at the bottom of the numerical domain, and liquid flows parallel to the gas into the domain.
- April 19, 2022 at 4:19 pm
  
  Rob
  Forum Moderator
  
  Check how the VOF model works, I think you'll want Eulerian or multifluid VOF (an addition to the Eulerian model).
  Once it's on, have a look at the phase interaction panel(s). Not sure if we have anything in the Help system beyond how the panels & models work.
- May 2, 2022 at 10:27 am
  
  snr1
  Subscriber
  
  Dear Rob, i have checked all the multiphase models. But my concern is how to model the mass transfer between two phases? For this interface mass transfer modelling which multiphase model is handy?
  Thanks
- May 2, 2022 at 5:08 pm
  
  DrAmine
  Ansys Employee
  
  Is it temperature driven or concentration driven?
- May 2, 2022 at 5:25 pm
  
  DrAmine
  Ansys Employee
  
  If concentration driven you might use UDF or work in 22R1 with the Hertz Knudsen mass transfer law as beta feature.
- May 3, 2022 at 4:53 am
  
  snr1
  Subscriber
  
  It is due to both temperature and concentration driven. How to model this phenomenon. If you have any relevant materials, kindly share them here.
- May 3, 2022 at 8:56 am
  
  DrAmine
  Ansys Employee
  
  I cannot share any thing on this platform. Just enable beta feature and check the documentation on Hertz-Knudsen Model. Moreover you will find a large number of articles dealing with this kind of interfacial mass transfer.
- May 3, 2022 at 11:19 am
  
  snr1
  Subscriber
  
  How to enable to beta feature ?
- May 3, 2022 at 8:05 pm
  
  DrAmine
  Ansys Employee
  
  Use the command searcher toolbar in Fluent and it will find it for you.
  Or read the manual Fluent Beta Features.

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