# temperature limited - absolute pressure limited

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 August 22, 2006, 02:20 temperature limited - absolute pressure limited #1 Asashi Guest   Posts: n/a 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 !!

 August 23, 2006, 04:17 Re: temperature limited - absolute pressure limite #2 saghir Guest   Posts: n/a solve-->controls-->limits ; and change the limite values. but it's bed solution you must adapte this cell or the grid

 March 31, 2011, 18:35 temperature limit to cell #3 Member   Join Date: Mar 2011 Posts: 50 Rep Power: 7 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.

July 18, 2014, 09:51
Hypersonic Flow Over Cylinder ( Temperature very high~280,000)
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Mike
Join Date: Jun 2012
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Quote:
 Originally Posted by cdf_user 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
Attached Images
 hypersonicflow_hightemp.jpg (39.9 KB, 41 views)

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