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thermal BC's across the interanl surface between the heat sink and air in the channel
Posted 30.03.2013, 12:50 GMT-4 Heat Transfer & Phase Change Version 4.3 1 Reply
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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 03.04.2013, 16:51 GMT-4
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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