boundary condition and differenet constant properties for for two different region.

alvora · January 25, 2011, 03:17

Hello friends,

I am new user with openfoam. the problem geometry is the small cube inside the big cube. The small cube inside the bigger cube is surrounded by air. I want to analize the current distribution in the full domain also in small cube. So, I can't consider the small cube as wall because I have to analyze the small cube surface current distribution.

the problem is: the thermal conductivity is different for air and small cube. but, only one equation is used to solve the problem and that equation contain the thermal conductivity term. so, How I have to define the constant properties (thermal consuctivity) for two different region? and How I have to define the boundary condition at the small cube surface which is contact with air?

Anyone can help..please..
thanx for your help.

Kind regards
Alpesh

mvoss · January 25, 2011, 03:30

hi,
take a look at chtMultiRegionFoam.

neewbie

alvora · January 25, 2011, 04:08

Hi neewbie sir,

Thank you very much for quick reply..

kind regards
alpesh

January 25, 2011, 03:17	boundary condition and differenet constant properties for for two different region.	#1
alvora Member Alpesh Join Date: Jan 2011 Location: Germany Posts: 52 Rep Power: 15	Hello friends, I am new user with openfoam. the problem geometry is the small cube inside the big cube. The small cube inside the bigger cube is surrounded by air. I want to analize the current distribution in the full domain also in small cube. So, I can't consider the small cube as wall because I have to analyze the small cube surface current distribution. the problem is: the thermal conductivity is different for air and small cube. but, only one equation is used to solve the problem and that equation contain the thermal conductivity term. so, How I have to define the constant properties (thermal consuctivity) for two different region? and How I have to define the boundary condition at the small cube surface which is contact with air? Anyone can help..please.. thanx for your help. Kind regards Alpesh

January 25, 2011, 03:30		#2
mvoss Senior Member Matthias Voß Join Date: Mar 2009 Location: Berlin, Germany Posts: 449 Rep Power: 20	hi, take a look at chtMultiRegionFoam. neewbie

January 25, 2011, 04:08		#3
alvora Member Alpesh Join Date: Jan 2011 Location: Germany Posts: 52 Rep Power: 15	Hi neewbie sir, Thank you very much for quick reply.. kind regards alpesh