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patching-initial temperature

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Old   September 14, 2007, 10:14
Default patching-initial temperature
  #1
Lousa
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hey all,

im having some trouble with patching. I have a rectangular domain, at which I want to define initial temperature 30 degrees C at the upper boundary, 20 degrees C at the lower boundary and I want the temperature to linearly decrease from 30 to 20 at the points inbetween. Can anyone help please?? Any suggestions would be greatly appreciated!

regards, Louisa
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Old   September 14, 2007, 10:59
Default rephrase of the above
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Lousa
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hey,

I thought my problem is explained better this way:

im having some trouble with patching. I have a rectangular domain, at which I define backflow temperature 30 degrees C at the upper boundary, 20 degrees C at the lower boundary and I want the initial temperature to linearly decrease from 30 to 20 at the points inbetween. The fluid enters the domain from a "hole" and is at 15 degrees C initially. At the initial conditions, i put 15C? Then how can I make the initial temp of the domain (porous media) to decrease linearly? Can anyone help please?? Any suggestions would be greatly appreciated!

regards, Louisa
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Old   September 14, 2007, 11:36
Default Re: rephrase of the above
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Joe
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Setting spatially varying initial temperatures is simple via an udf. Look in the udf manual for the section and example dealing with initial conditions.
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