Why there is no data about HTC?

Tristan Can · November 9, 2023, 04:27

Hi!
I have set the output boundary heat transfer coefficient in the post variable selection of convert, but it is not in my out file. Also, when I look at the 3D results in tecplot, the boundary HTC parameter is always 0 and there is no valid value. Did I set it incorrectly?
Thank you for help!

alexzhangyu · November 13, 2023, 10:29

Hi Tristan,

If I understood your question correctly, there are two aspects here:
1. The post variables you selected will not show up in your output file, the selection of the post variable is used to control what quantities will be included in the 3D post files (.h5 file).
2. By definition, the boundary HTC is the "Heat transfer coefficient for convection boundaries. This value should be equal to that specified in boundary.in". In other words, if you don't have a convection BC in your case setup, this value is expected to be zero.

Hope it helps.

Yu Zhang
CONVERGE Support team

MFGT · November 14, 2023, 01:49

I guess what you want to have can be achieved by activating the transfer.out file:

transfer_flag: 1 in inputs.in

Then use this transfer file for mapping HTC variables to a modified FEA geometry. See the HTC mapping documents from the downloads.

November 9, 2023, 04:27	Why there is no data about HTC?	#1
Tristan Can New Member Tsui Tsan Join Date: May 2023 Posts: 11 Rep Power: 3	Hi! I have set the output boundary heat transfer coefficient in the post variable selection of convert, but it is not in my out file. Also, when I look at the 3D results in tecplot, the boundary HTC parameter is always 0 and there is no valid value. Did I set it incorrectly? Thank you for help!

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November 13, 2023, 10:29		#2
alexzhangyu New Member Yu Zhang Join Date: Oct 2021 Location: Madison Posts: 15 Rep Power: 4	Hi Tristan, If I understood your question correctly, there are two aspects here: 1. The post variables you selected will not show up in your output file, the selection of the post variable is used to control what quantities will be included in the 3D post files (.h5 file). 2. By definition, the boundary HTC is the "Heat transfer coefficient for convection boundaries. This value should be equal to that specified in boundary.in". In other words, if you don't have a convection BC in your case setup, this value is expected to be zero. Hope it helps. Yu Zhang CONVERGE Support team

November 14, 2023, 01:49		#3
MFGT Senior Member Tobias Join Date: May 2016 Location: Germany Posts: 268 Rep Power: 11	I guess what you want to have can be achieved by activating the transfer.out file: transfer_flag: 1 in inputs.in Then use this transfer file for mapping HTC variables to a modified FEA geometry. See the HTC mapping documents from the downloads.