# NEED U HELP:how to get the difference in temperature between two wall boundaries?

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August 1, 2010, 22:13
NEED U HELP:how to get the difference in temperature between two wall boundaries?
#1
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Hi, all, i got a problem need u help.
As the attached shows, i want to get the temperature difference between two parallel solid walls, id=7 and 18 respectively.
I try to use UDMI to get the temperature on one wall/nearby fluid, but how can i pass the value to the other side?
Plz help me, Thanks...
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 August 2, 2010, 11:18 #2 New Member   Luk Join Date: Jun 2009 Posts: 24 Rep Power: 9 Do you want to calculate a conduction between fluid-solid-fluid? Use a coupled wall boundary condition (use search for guidelines, or user guide). __________________ *******************************

August 2, 2010, 20:47
#3
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Quote:
 Originally Posted by Geisel Do you want to calculate a conduction between fluid-solid-fluid? Use a coupled wall boundary condition (use search for guidelines, or user guide).
Thanks Geisel. i knew the coupled wall boundary and have already used in my models.
there is a mass transfer cross the wall, i want to calculate the additional heat transfer coursed by the mass transfer. the additional heat flux can be writen as: N=k*(T_f - T_p). T_f & T_p are temperature on both sides of wall respectively. how can i get the T_f's thread and T_p's thread together? that is my problem.

 August 5, 2010, 10:12 #4 New Member   Federico Join Date: Aug 2010 Posts: 3 Rep Power: 8 Hallo oldfreshman To get the temperature on the wall you can use this two command t = Lookup_Thread(domain,your_surface_ID); T=F_T(f,t) i hope it was helpful. Ciao

August 12, 2010, 23:27
#5
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Quote:
 Originally Posted by Friedmann Hallo oldfreshman To get the temperature on the wall you can use this two command t = Lookup_Thread(domain,your_surface_ID); T=F_T(f,t) i hope it was helpful. Ciao
Thanks Friedmann.

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