Heating of a metal piece in a furnace

Paulik · December 11, 2009, 07:03

Just a question. It takes more than 10000 iterations for heating the metallic body for you too ? I scaled the grid to mm and I increased the heat flux but it still takes a lot of time. Do you have the same problem ?

JohannV · December 11, 2009, 07:40

I have had the same problem. I think the results are correct. You should calculate and validate them with analytical equations.

I am now calculatin a vice versa case, I have a tube(quarzglas) and this is heated by a gasburner up to 1790 K. The heat transfer to the air inside the tube is going very (fast), to compare to your case. This is bacause of the different Heat Transfer and Heat Capacity coefitionts of the air and the metall pice.

As I sad, to bee sure calculate them analytical, the equiations for this case shuld be not difficult.

bashu · December 14, 2009, 16:02

are you still trying to solve this problem?

Paulik · February 21, 2010, 15:44

Yeah still working on it.
Johann, i'm still trying to solve it. I tried it in milions of ways but nothing. I'll post, again, a picture with a sample of it. The furnace's interior heats perfectly, exept the metal sample. I don't know how can I "activate" the conduction. I think this is the problem.
I tried to set that sample as a solid zone and nothing. I left it as default - nothing. I tried to build it in Gambit using sweep for every face, made it a full body then splitting in a lot of faces etc. and nothing. I don`t know what else to do.

Here is the picture.

December 14, 2009, 16:02	still a problem	#23
bashu New Member Join Date: May 2009 Posts: 2 Rep Power: 0	are you still trying to solve this problem?

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December 11, 2009, 07:03		#21
Paulik New Member Paul Join Date: Dec 2009 Posts: 12 Rep Power: 16	Just a question. It takes more than 10000 iterations for heating the metallic body for you too ? I scaled the grid to mm and I increased the heat flux but it still takes a lot of time. Do you have the same problem ?

December 11, 2009, 07:40		#22
JohannV New Member Johann V Join Date: Oct 2009 Posts: 19 Rep Power: 16	I have had the same problem. I think the results are correct. You should calculate and validate them with analytical equations. I am now calculatin a vice versa case, I have a tube(quarzglas) and this is heated by a gasburner up to 1790 K. The heat transfer to the air inside the tube is going very (fast), to compare to your case. This is bacause of the different Heat Transfer and Heat Capacity coefitionts of the air and the metall pice. As I sad, to bee sure calculate them analytical, the equiations for this case shuld be not difficult.

February 21, 2010, 15:44		#24
Paulik New Member Paul Join Date: Dec 2009 Posts: 12 Rep Power: 16	Yeah still working on it. Johann, i'm still trying to solve it. I tried it in milions of ways but nothing. I'll post, again, a picture with a sample of it. The furnace's interior heats perfectly, exept the metal sample. I don't know how can I "activate" the conduction. I think this is the problem. I tried to set that sample as a solid zone and nothing. I left it as default - nothing. I tried to build it in Gambit using sweep for every face, made it a full body then splitting in a lot of faces etc. and nothing. I don`t know what else to do. Here is the picture.