[karl1bk]

Hello,

I have a problem. I want to get the temperature of an horizontal surface. I want to include the effects of convection and radiation. In "mixed" option, it expects “External Radiation Temperature”. What is the External Radiation Temperature and how to calculate this temperature?
Thanks for replying!

[m2montazari]

hi,
external radiation temp. is temp. of infinity. as you specified, radiation is important for you and radiation is occurred between you body and infinity. so temp. of infinity is used to calculate radiative heat flux: heat flux~(T^4-T_inf^4)
yours,
mohammad

[wangyun]

Originally Posted by m2montazari

hi,
external radiation temp. is temp. of infinity. as you specified, radiation is important for you and radiation is occurred between you body and infinity. so temp. of infinity is used to calculate radiative heat flux: heat flux~(T^4-T_inf^4)
yours,
mohammad

sorry, i,m confused to the external radiation temp.? can you tell me the specific information about it if you have time? thank you!