Unexpected result in heat conduction simulation

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Jacuna
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Joined: 08 Apr 2016, 20:37
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Unexpected result in heat conduction simulation

Post by Jacuna » 12 Apr 2016, 16:25

Hi everybody,

I have used Finite Element Simulations before but I am new to Elmer, so I tried to simulate a very simple heat conduction problem, it consists on a bar with rectangular cross section, a 10W heat source on one end, an isothermal BC on the other end and adiabatic BC on the longitudinal axis (I’ve uploaded the file I created). When I run the simulation the temperature everywhere is 25°C, and I don’t get any error message whatsoever. Could someone have a look at my model and check what could be missing??

Many thanks in advance!
Javier
Attachments
Kupfer_Bar.zip
Copper bar heat conduction simulation
(127.31 KiB) Downloaded 112 times

mzenker
Posts: 1993
Joined: 07 Dec 2009, 11:49
Location: Germany

Re: Unexpected result in heat conduction simulation

Post by mzenker » 12 Apr 2016, 18:11

Hi,

the heat flux is in W/m2, and your surface is 1 mm x 1.5 mm. So it seems that the tiny heat flux doesn't do anything measurable - we might touch at the precision of the calculation here. I have quickly run your case, dividing your 10 W by the surface, and I get 191 °C at the other end.

HTH,

Matthias

Jacuna
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Joined: 08 Apr 2016, 20:37
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Re: Unexpected result in heat conduction simulation

Post by Jacuna » 13 Apr 2016, 13:24

Thanks a lot Matthias, I knew it had to be a dumb error like that.

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