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No change in a time dependend model. Where is the fault?
Posted Jan 9, 2014, 3:42 a.m. EST Version 4.4 2 Replies
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I tried a very simple model:
= 3-D cylinder from
= copper (from the builtin material library) with an
= initial temperature of 293.15 K
= insulated at all surfaces, with one
= heated bottom surface at 1W/m^2 (overwriting the all-sided insulation for this surface.)
I used the study
= time-dependend
= time span= 0 to 100 s in 1 s time steps
I visualized the result at a surface vertically reaching from the heated bottom of the cylinder to the top surface.
I. e. there is heat input from one side and there are non-zero thermal parameters for the copper.
But surprisingly, no change in time can be found in the model result ! As You see in the attached file, after 100 s the whole cylinder is still at 293.15K.
Any idea, what I might have overlooked?
= 3-D cylinder from
= copper (from the builtin material library) with an
= initial temperature of 293.15 K
= insulated at all surfaces, with one
= heated bottom surface at 1W/m^2 (overwriting the all-sided insulation for this surface.)
I used the study
= time-dependend
= time span= 0 to 100 s in 1 s time steps
I visualized the result at a surface vertically reaching from the heated bottom of the cylinder to the top surface.
I. e. there is heat input from one side and there are non-zero thermal parameters for the copper.
But surprisingly, no change in time can be found in the model result ! As You see in the attached file, after 100 s the whole cylinder is still at 293.15K.
Any idea, what I might have overlooked?
Attachments:
2 Replies Last Post Jan 9, 2014, 5:32 a.m. EST
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Posted:
1 decade ago
Hans,
but obviously you do have a temperature gradient. It is small, but 1 W/m2 is very low power too.
Cheers
Edgar
--
Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
but obviously you do have a temperature gradient. It is small, but 1 W/m2 is very low power too.
Cheers
Edgar
--
Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
Thank You, completely correct!