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Originally Posted by Incoherent
Note that the distribution of the element vertices is not uniform (see attached example, T die low), hence perhaps median is better?
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Dunno, but think it depends on the outcome of the
"basis of "C" in C/W ?" thread[,when it finally gets round to wbs.
With it appearing that most die are going to have holes use whichever C is decided for calculating (C/W)in.
For Rwb am in favour of using(
link)
Q=UAdT(MTD)
and equating Rwb to UA (Rwb=1/UA)
Where
A=wb/die interface area
U="Overall Heat Transfer Coefficient"
and dT(MTD)= possibly LMTD= (Two -Twi)/lin((Tdie - Twi)/(Tdie-Two))
where Tdie is either mean or median,
So again, Dunno.
Getting nowhere with modeling "fb's surface T".
Think need Femlab surface solution
Alternatively an adaptation of your Model, getting Femlab solution for TIM and using in the "adapted Model" to obtain it's W, then using to get a Tfb.surface.
Keep returning to your old Model ,thinking this is the answer but using columns instead of slices, muttering incantations and waiting.Nothing happens, think it needs your magic.
Edit: Inserted Rwb=1/UA