Jump to content
RAMGANESH

Absolute negative temperature for Material model-reg

Recommended Posts

I have been working on internal flow analysis of an valve.



 


Boundary conditions are 


 


Inlet- 4 Bar pressure


 


Outlet - Ambient condition


 


Output required - Velocity at the outlet.


 


Ideal Gas is the material medium.


 


I had set the boundary conditions as in the workshop 4 in the tutorial fro compressible flow


 


but i am getting an error as Absolute negative temperature for Material model


 


please provide valuable guidelines


 


Thanks


Ram




post-34029-0-22795700-1434791253_thumb.j

Share this post


Link to post
Share on other sites

The startup process with Ideal Gas can sometimes go poorly if the initial conditions are far from a physically correct state.  We often suggest running a constant density case first - then restart with Ideal Gas density.  Also, make sure the input file represents correct values for absolute temperature and pressure - initial conditions and boundary conditions.


Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
You are posting as a guest. If you have an account, please sign in.
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...