Fluids

Fluids

Question about blood flow simulation in vessel

    • c20092053
      Subscriber

      Hi guys,


       


      I am tasked to use FLUENT to simulate blood flow through a vessel. In this task, I am given a vessel model which I meshed already and the inlet pressure and mass-flow-rate. This task does not need to consider the pulsation of bloodstream but to treat it as steady flow. 


       


      The problem is, since the outlet pressure is unknown, I am not sure about which boundary condition should I use. I tried to not inputting any value when using pressure outlet, but it seems FLUENT will automatically set it to 0. Also I tried to use outflow, but it seems this boundary condition does not fit in my case for my vessel profile is not at all smooth.


       


      If you have any suggestions, I am glad to hear that. Thank you for your helps in advance.


       


      Joseph

    • RK
      Ansys Employee

      Hi Joseph, 


      Going by what has been mentioned here, I would go with outflow boundary condition. You can probably try to relocate the outflow boundary condition.



      Regards, 


      Rahul 

    • c20092053
      Subscriber

      Hi Joseph, 


      Going by what has been mentioned here, I would go with outflow boundary condition. You can probably try to relocate the outflow boundary condition.



      Regards, 


      Rahul 


      Thank you for your reply Rahul. Still. my model is not consistent in shape along the vessel, which means the flow within the vessel is always in the B position in the figure you attached. To use outflow as boundary condition, I think I will need to  Therefore I don't really think outflow boundary condition does not fit my case. 


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