CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

highly compressible flow : Fluent Error Message

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   November 3, 2005, 13:59
Default highly compressible flow : Fluent Error Message
  #1
Amit Shrestha
Guest
 
Posts: n/a
Hi,

I have a 3D model (with hybrid meshing) of an aerofoil. When I run it in fluent under Coupled-Explicit Solver and Compressible condition (density-ideal) the following error message comes up.

Error: Specific_Heat_by_T_integral: invalid lower bound, T0 <= 0 Error: Object: ()

I would be grateful if anyone could help me with this.

Many thanks, Amit Shrestha
  Reply With Quote

Old   November 3, 2005, 14:05
Default Re: highly compressible flow : Fluent Error Messag
  #2
Jason
Guest
 
Posts: n/a
It sounds like your temperature is going to 0K. If this is happening before iterating, then it's probably your boundary conditions. If this is happening while it's iterating, then you should check your limits for temperature (Solve->Controls->Limits) and make sure you're not letting your temperature reach 0K.

Good luck, Jason
  Reply With Quote

Old   November 4, 2005, 04:28
Default Re: highly compressible flow : Fluent Error Messag
  #3
Amit Shrestha
Guest
 
Posts: n/a
Thanks Jason,

I will look into it. But I am quite confused since the possiblity of the temperature going to 0K is quite remote since I am working in the region of 800 to 2000K.

Amit
  Reply With Quote

Old   November 4, 2005, 08:33
Default Re: highly compressible flow : Fluent Error Messag
  #4
Ahmed
Guest
 
Posts: n/a
Check underrelaxation for pressure, reduce it to say 0.01 then increase it as the solution progress
  Reply With Quote

Old   November 11, 2005, 00:31
Default Re: highly compressible flow : Fluent Error Messag
  #5
Libing
Guest
 
Posts: n/a
check your boundary conditions and operating pressure. Make sure they are correct. inconsistent pressure setting could lead to this warning.
  Reply With Quote

Old   December 19, 2018, 08:43
Smile
  #6
New Member
 
Join Date: Apr 2016
Posts: 14
Rep Power: 9
kuzma169 is on a distinguished road
Quote:
Originally Posted by Amit Shrestha
;125799
Hi,

I have a 3D model (with hybrid meshing) of an aerofoil. When I run it in fluent under Coupled-Explicit Solver and Compressible condition (density-ideal) the following error message comes up.

Error: Specific_Heat_by_T_integral: invalid lower bound, T0 <= 0 Error: Object: ()

I would be grateful if anyone could help me with this.

Many thanks, Amit Shrestha
It's result of having warpage element faces. Search for bad elements . You need finding wrong surface orientation, wrapped element face or negative - neglected volume etc. It's my opinion founded to my experiences.

Best regards.

Cheerio!
kuzma169 is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Incompressible and compressible flow. Confused student. Main CFD Forum 27 March 18, 2017 13:25
help with compressible flow BC's (need subsonic flow) meangreen Main CFD Forum 5 July 24, 2010 14:16
transient compressible flow problem (urgent plz) jehanzeb FLUENT 5 August 3, 2004 09:04
Compressible flow simulation using FLUENT arun Main CFD Forum 0 February 16, 2004 16:44
compressible channel flow.. R.D.Prabhu Main CFD Forum 0 July 17, 1998 18:23


All times are GMT -4. The time now is 23:59.