Fluids

Fluids

How to set DPM boundary condition for “interface” in Fluent?

    • jianan.zhao
      Subscriber

      Hi everyone,


      I have trouble with choosing the correct boundary condition for DPM simulation in Fluent. There are two domains: room domain and human airway domain as shown in figures. The interface between those two domains is named "mouth-inlet", which is set as velocity inlet. Particles are injected at the table in room domain. I would like to see how many particles are transported into human airway. 


      What type of boundary condition should be imposed at the "mouth-inlet" to let particles be tracked continuously in both room and airway domains? Can I use UDF to impose an interior boundary condition for the mouth-inlet? I would very much like to know how to write interior boundary condition UDF for DPM simulation. I really appreciate any help.             -- Jianan 



    • Keyur Kanade
      Ansys Employee

      Hi,


      Can you please try Post processing --> model specific --> Discrete phase --> Sample. 


      Sampling of DPM particles can be used to get the information of particles passing through the boundary (passing position and particle velocity and particle size, etc.).


      Regards,


      Keyur

    • jianan.zhao
      Subscriber

      Hi Keyur,


      Thank you for reply. I will try your method. By the way, do I need to use UDF also? Thank you.


      Regards,


      Jianan

    • DrAmine
      Ansys Employee

      Hi,


       


      For general purpose sampling you do not require any UDF.


       


      A.

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