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-   -   temperature limited - absolute pressure limited (http://www.cfd-online.com/Forums/fluent/42088-temperature-limited-absolute-pressure-limited.html)

Asashi August 22, 2006 02:20

temperature limited - absolute pressure limited
 
Hi all

I,m simulating a bullet in the air (supersonic, euler). The first order stops at about 100 iterations, and the residuals jump over 1e+10 !

Here is a screenshot of the situation : http://img182.imageshack.us/img182/6...eenshotge6.png

The error message says : temperature limited to 5.000000e+03 in 1 cells on zone 2 ...and... absolute pressure limited to 1.000000e+00 in 1 cells on zone 2

Does anybody have any idea about how to fix it ??

Many thanks !!

saghir August 23, 2006 04:17

Re: temperature limited - absolute pressure limite
 
solve-->controls-->limits ; and change the limite values. but it's bed solution you must adapte this cell or the grid


cdf_user March 31, 2011 18:35

temperature limit to cell
 
Thanks that actually worked!!

still I am not sure why the temperature would be so high....

I have a cylinder which is receiving a heat flux of 15000 and it says temperature for 2345678 cell is 1.5e4 which is the same value as the flux. I am assuming this cell is near the wall.

dreamchaser July 18, 2014 09:51

Hypersonic Flow Over Cylinder ( Temperature very high~280,000)
 
1 Attachment(s)
Quote:

Originally Posted by cdf_user (Post 301742)
Thanks that actually worked!!

still I am not sure why the temperature would be so high....

I have a cylinder which is receiving a heat flux of 15000 and it says temperature for 2345678 cell is 1.5e4 which is the same value as the flux. I am assuming this cell is near the wall.

Hello,

I am modeling hypersonic flow (Mach 24) over a cylinder. I also faced the same problem where I am getting a temperature around 280,000 which does not make any sense.

I wonder if it is because I have assumed constant specific heats. But I feel something else is wrong here.

I have attached a picture of the temperature profile and boundary conditions. Any advice would be appreciated.

Thanks,

Dreamchaser


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