velocity is nearly coming to zero

- March 23, 2018 at 9:16 am
  
  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.
- March 23, 2018 at 11:08 am
  
  peteroznewman
  Subscriber
  
  Please provide more details, a screen snapshot and attach a project archive for further help.
- March 25, 2018 at 11:02 am
  
  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
- March 25, 2018 at 11:08 am
  
  Raef.Kobeissi
  Subscriber
  
  Please check this tutorial:
  
  https://www.youtube.com/watch?v=_3wyysyWqsg
- March 30, 2018 at 4:59 pm
  
  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.
- March 30, 2018 at 5:06 pm
  
  vaibhav jain
  Subscriber
- March 30, 2018 at 6:01 pm
  
  vaibhav jain
  Subscriber
  
  reverse flow problem may happen. i am also attaching other file having greater dimensions
- April 1, 2018 at 8:15 pm
  
  Raef.Kobeissi
  Subscriber
  
  can you try and use outflow rather than outlet pressure?
  
  Cheers
- April 2, 2018 at 4:38 pm
  
  vaibhav jain
  Subscriber
  
  i have tried it but does not give favourable outcomes.
- April 3, 2018 at 8:15 pm
  
  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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