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Hello,
I am trying to simulate a simple problem for transient heat transfer. I using 2D planar object with a cross section of a cylinder. Initially my body is at 300 K and then the BC are - at inner radius a temperature of 1200 K is imposed and at the outer radius a temperature of 300 K is maintained. When I run the analysis in steady state I get the expected heat temperature distribution. However with the transient analysis I believe my solution is not propagating with time at all. 1. I use a pre-defined field for specifying initial temp condition. 2. For the second step I have experimented with time period of upto 10 and max allowable increment of time as 0.01. 3. Whenever I run this analysis the only change in temperature distribution that I can see is in the elements comprising of the inner radius. The temperature of all the other elements remain same at 300K. Can someone please help me as to where I am going wrong. Thanks a lot |
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Can anyone please help. I
Can anyone please help. I appreciate any inputs that I can get.
Thanks guys.
Hi, I'm not sure if i
Hi,
I'm not sure if i understand correctly your question but try to build a model following this video :
http://www.youtube.com/watch?v=HO4x7Ga21hU
you will maybe figure out what is missing in your model.
Did you desactivate the initial temp in your second step?
Regards
Increase the time period
Hi,
A general rule of thumb- the more the 'Time period' that you mention, usually the more the 'increments', and hence smoother distribution.
What I mean, is that I don't think you are giving enough time to your model to finish the analysis. Try giving more time-period, and the results should be better (though giving huge time periods is also pointless. They should just be big enough).
You can always decrease the 'Initial increment size' if you have problems with convergence. This can be calculated as well, but given the simplicity of your model- I suggest you simpkle go trial and error.
Best of luck,
Vikrant Srivastava