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How to solve "temperature limited to 1.000000e+00 in 114 cells on zone 19 in domain 1 |
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March 19, 2017, 11:38 |
How to solve "temperature limited to 1.000000e+00 in 114 cells on zone 19 in domain 1
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#1 |
New Member
Heng Kok Nguan
Join Date: Dec 2016
Posts: 4
Rep Power: 9 |
Hi all,
I had this problem upon calculation, May I know how to solve this problem? My simulation is about a double pipe cylindrical heat exchanger with constant heat on the surface of the outerpipe. The heat exchanger is only modelled 1/4 to take advantage of the cylindrical symmetry. The water is pumped through the "water-inlet" and allowed to flow to the bottom of heat exchanger and flow back up and exits via "water-outlet". The outer pipe is surrounded with earth rock where its temperature is 383 K. The flow is turbulent. Can anyone help? Thank you. water inlet v = 0.5m/s t = 283 K surface of outer pipe = 383 K the outer pipe is surrounded with earth rock where its temperature is 383 K. the flow is turbulent |
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March 19, 2017, 17:23 |
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#2 | |
Senior Member
Kushal Puri
Join Date: Nov 2013
Posts: 182
Rep Power: 12 |
Quote:
If you want to proceed with the same mesh, just turn off the secondary gradient of the temperature by typint the following command in TUI (rpsetvar 'temperature/shell-secondary-gradient? #f) typpe the above command along with brackets and continue your run. All the warnings will go after some iterations. |
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March 22, 2017, 02:30 |
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#3 |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,740
Rep Power: 66 |
Try a better initial guess.
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March 29, 2017, 13:26 |
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#4 |
New Member
Heng Kok Nguan
Join Date: Dec 2016
Posts: 4
Rep Power: 9 |
Hi. Thanks for your reply. I had check my skewness quality with a maximum of 0.75. I'm using multizone method with hexa/prism mesh. I had already typed (rpsetvar 'temperature/shell-secondary-gradient? #f) in TUI command but the same problem with temperature being limited still exist. Please help. thank you.
Last edited by heng94; March 29, 2017 at 15:46. |
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March 29, 2017, 14:51 |
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#5 |
New Member
Heng Kok Nguan
Join Date: Dec 2016
Posts: 4
Rep Power: 9 |
A better initial guess? Do you mind to explain further? Thank you very much
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October 18, 2019, 10:24 |
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#6 | |
Member
Muhammad Ali Uzair
Join Date: Sep 2017
Posts: 44
Rep Power: 9 |
Quote:
If yes, please tell how did you do it Best |
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September 6, 2022, 08:27 |
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#7 |
Senior Member
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I dont know what is causing problem in your case. But I managed to solve this problem by making proper mesh. By proper I mean I reduced the sudden change in mesh size in solid zone and made it almost uniform.
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Tags |
heat exchanger, temperature limited, turbulent |
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