CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > CD-adapco

Ultra high temperature?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   July 18, 2005, 03:03
Default Ultra high temperature?
  #1
bk
Guest
 
Posts: n/a
I am using sorsca.f and sorent.f to consider of scalar genetraion due to high temperature( more than 1.0e6K) with the option-multi component specific heat, viscosity etc... But Looking at star.info, I found the follwing message;

|----------------------------------|

| DOMAIN: star_0001 |

|----------------------------------|

TIME STEP = 4; ELAPSED TIME = 0.800000E-10 s; TABLE/USER CODING

---------------------------------------------------------------------

*** WARNING #090 *** VALUE ELOG*YPLUS OR ELOG*EFFVIS/(CAPPA*VISCOS) IS LESS THAN 1.1 AT 100 CELLS.

UPLUS=YPLUS LAW IS USED. IF THIS SITUATION PERSISTS, INCORRECT RESULTS MAY BE OBTAINED.

*** WARNING #090 *** VALUE ELOG*YPLUS OR ELOG*EFFVIS/(CAPPA*VISCOS) IS LESS THAN 1.1 AT 100 CELLS.

UPLUS=YPLUS LAW IS USED. IF THIS SITUATION PERSISTS, INCORRECT RESULTS MAY BE OBTAINED.

MAXIMUM COURANT NUMBER = 1.154E-03 AT CELL 7900 MEAN COURANT NUMBER = 1.130E-04

*** WARNING #007*** SETTING T AT CELL 7501 FROM 8.285E+04 TO 2.000E+04

*** WARNING #007*** SETTING T AT CELL 7502 FROM 5.168E+04 TO 2.000E+04

*** WARNING #007*** SETTING T AT CELL 7503 FROM 3.122E+04 TO 2.000E+04

*** WARNING #007*** SETTING T AT CELL 7701 FROM 8.296E+04 TO 2.000E+04

*** WARNING #007*** SETTING T AT CELL 7702 FROM 5.175E+04 TO 2.000E+04

*** WARNING #007*** SETTING T AT CELL 7703 FROM 3.126E+04 TO 2.000E+04

*** WARNING #007*** SETTING T AT CELL 7901 FROM 8.296E+04 TO 2.000E+04

*** WARNING #007*** SETTING T AT CELL 7902 FROM 5.175E+04 TO 2.000E+04

*** WARNING #007*** SETTING T AT CELL 7903 FROM 3.126E+04 TO 2.000E+04

*** WARNING #007*** SETTING T AT CELL 8101 FROM 8.296E+04 TO 2.000E+04

*** WARNING #007*** SETTING T AT CELL 8102 FROM 5.175E+04 TO 2.000E+04

*** WARNING #007*** SETTING T AT CELL 8103 FROM 3.126E+04 TO 2.000E+04

*** WARNING #007*** SETTING T AT CELL 8301 FROM 8.296E+04 TO 2.000E+04

*** WARNING #007*** SETTING T AT CELL 8302 FROM 5.175E+04 TO 2.000E+04

*** WARNING #007*** SETTING T AT CELL 8303 FROM 3.126E+04 TO 2.000E+04

*** WARNING #007*** SETTING T AT CELL 8501 FROM 8.285E+04 TO 2.000E+04

*** WARNING #007*** SETTING T AT CELL 8502 FROM 5.168E+04 TO 2.000E+04

*** WARNING #007*** SETTING T AT CELL 8503 FROM 3.122E+04 TO 2.000E+04

Why do these message occurs????????????

My calcualtion informations are - compressible flow - turbuletnt option ON - Courant number is satisfied during simulation - Scalars are ION, ELE, and theses scalars are "active"

  Reply With Quote

Old   July 18, 2005, 06:44
Default Re: Ultra high temperature?
  #2
John Luo
Guest
 
Posts: n/a
You have hit the maximum T limit setting internally in STAR-CD, use Real-Constant 90 to change the set (in Nav-Center, Analysis Controls=>Other Controls=>Switches and Real Constants. After setting R90, write the probe file again (prob).
  Reply With Quote

Old   July 19, 2005, 00:01
Default Re: Ultra high temperature?
  #3
bk
Guest
 
Posts: n/a
Thank you John. I solved my problem about warning message in *.info file. Hmm... How do you know that the R90 means the maximu T limit? And Do you know the meanings of the others Real-Constants?
  Reply With Quote

Reply

Thread Tools
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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
High temperature methane+air Peter FLUENT 5 January 26, 2009 19:04
Ultra high temperature case BK CD-adapco 1 March 4, 2004 04:12
Ultra high Pressure water ? Optixxx FLUENT 0 November 8, 2003 10:21
Why temperature is so high? Albert FLUENT 2 June 22, 2003 11:28
High temperature problem Julie Polyakh CD-adapco 1 January 5, 2002 17:24


All times are GMT -4. The time now is 06:53.