Fluids

Fluids

velocity is nearly coming to zero

    • vaibhav jain
      Subscriber

      my project is about buoyancy induced flow in inverted conical tube. i am getting too low values of velocity. what are the possible reasons.

    • peteroznewman
      Subscriber

      Please provide more details, a screen snapshot and attach a project archive for further help.

    • Raef.Kobeissi
      Subscriber

      It is expected to have low-velocity values with a Buoyancy-induced flow. As Peter said , it would be nice if you can provide additional information about your case.


      I also recommend you to read about the Boussinesq approximation for buoyancy.


      Regards

    • Raef.Kobeissi
      Subscriber

      Please check this tutorial:


    • vaibhav jain
      Subscriber

      hi, i want to perform combustion of methane and air in vertical induced buoyancy inverted funnel pipe. i have to perform analysis using epsilon k model and non premixed combustion and second epsilon k model and species transport. energy equation is to be switch on i both conditions . take gravity and steady flow and axisymmetric. the problem i am facing is not getting converged results and results are not coming as expected in both species and non premixed combustion. both air and methane enters inlet but can't react. i dont know why?  fuel and air are coming from same inlet. i am attaching a file of it. please look into it.

    • vaibhav jain
      Subscriber


    • vaibhav jain
      Subscriber

      reverse flow problem may happen. i am also attaching other file having greater dimensions

    • Raef.Kobeissi
      Subscriber

      can you try and use outflow rather than outlet pressure?


       


      Cheers

    • vaibhav jain
      Subscriber

      i have tried it but does not give favourable outcomes. 

    • raul.raghav
      Subscriber

      Vaibhav, the files you attached does not show how you set things up. Could you attach the workbench archive file that has the setup completed?

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