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UDF for hear transfer coefficient in nonthermal equilibrium porous meda 

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February 24, 2014, 20:44 
UDF for hear transfer coefficient in nonthermal equilibrium porous meda

#1 
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Sherif
Join Date: Jan 2014
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Hello,
I am trying to make a udf for the solidliquid heat transfer coefficient for the thermal nonequilibrium model for porous media. The heat transfer coefficient is a function of the temperature of the solid and liquid zones as well as the thermal conductivity of the fluid. I am wondering how I can call the temperature variables in both zones? as well as how can I use the thermal conductivity property of the fluid as a variable in the UDF. Thanks 

July 24, 2014, 19:23 

#2 
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Join Date: Nov 2013
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Hello. Did you solve your problem and write a udf for heat transfer coeff.?
Thank you. 

January 15, 2015, 05:27 

#3 
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Anonymous Joe
Join Date: Jun 2013
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i have the same problem, i want to get the temperature of the solid in the porous zone.


January 15, 2015, 12:04 

#4 
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After creating the solid domain, get the domain ID (cell condition tab).
In the UDF, write something similar to: int Zone_ID_solid = 9; /* solid zone ID*/ Domain *d = Get_Domain(1); cell_t c; Thread *thread_solid = Lookup_Thread(d,Zone_ID_solid); begin_c_loop(c,thread_solid) { T_solid = C_T(c,thread_solid); } end_c_loop(c,thread_solid) This will read the temperature in the cells of the zone specified. I think this would work, but I haven't check it. 

June 29, 2015, 05:41 

#5 
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Harry
Join Date: May 2013
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Hello. I want to impose an equal temperature and flux condition at the interface between the porous zone and fluid zone in thermal nonequilibrium model through the equation K_se*dT_s/dr = K_fe*dT_f/dr = K_f*dT_f/dr = q_interface and T_s = T_f at the interface (where, K_se & K_fe are effective solid and fluid conductivity, q is the heat flux).I don't know how to write udf for this as I am not good in udf. I will be thankful for any suggestion about what macros should I use and how to implement.


May 17, 2016, 09:19 

#6  
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gui
Join Date: Oct 2013
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Quote:
Thanks 

May 24, 2016, 06:50 

#7  
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gui
Join Date: Oct 2013
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Quote:
Did you manage to obtain the solid temperature in the porous domain? If yes, how did you do it? Thank you, G Last edited by guilbemloco; May 24, 2016 at 09:23. 

November 16, 2016, 13:38 

#8 
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parviz hash
Join Date: May 2012
Posts: 16
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Hi every body
I Have the same problem. I want to consider heat transfer coeff. as a function of reynolds number. How can I do this? Please help me 

January 2, 2020, 00:43 

#9 
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Uday Kumar
Join Date: Dec 2019
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did you solve this? I am doing the same type of problem. in which heat transfer coefficient need to give in terms of reynolds number. Could you please help me out?


Tags 
heat transfer coefficient, nonthermal equilibrium, porous media, udf 
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