Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.
Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
thermal BC's across the interanl surface between the heat sink and air in the channel
Posted 30 mars 2013, 12:50 UTC−4 Heat Transfer & Phase Change Version 4.3 1 Reply
Please login with a confirmed email address before reporting spam
n Model Library : Heat transfer module : Tutorial models: heat sink .
It is considered the temperature filed is continuous across the internal surface between the heat sink and the air channel. first of all :
what about heat flux ? It is considered continuous too or not ? if it is not, What kind of thermal BC's across the internal surface between heat sink and air channel ? Please can you state your answer in equations?
thanks
Ahmed ... Udmercy
It is considered the temperature filed is continuous across the internal surface between the heat sink and the air channel. first of all :
what about heat flux ? It is considered continuous too or not ? if it is not, What kind of thermal BC's across the internal surface between heat sink and air channel ? Please can you state your answer in equations?
thanks
Ahmed ... Udmercy
1 Reply Last Post 3 avr. 2013, 16:51 UTC−4
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
Hi
in NITF the wall (interface boundary of fluid and solid) has a continuity transfer of the heat flux, now the heat arrives at the solid to fluid wall, that is by default in a "no-slip" condition, so the heat must conduct through the air / fluid surface layer first before also mixing by fluid mass motion (transport) and transport is velocity dependent, so no need to add any "convective cooling BC since this is only a lumped "engineering" model of the true solid to fluid heat transfer
--
Good luck
Ivar
in NITF the wall (interface boundary of fluid and solid) has a continuity transfer of the heat flux, now the heat arrives at the solid to fluid wall, that is by default in a "no-slip" condition, so the heat must conduct through the air / fluid surface layer first before also mixing by fluid mass motion (transport) and transport is velocity dependent, so no need to add any "convective cooling BC since this is only a lumped "engineering" model of the true solid to fluid heat transfer
--
Good luck
Ivar