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Originally Posted by BillA
do you mean "the block geometry needs to be known" in the sense of Les' Apca ?
would this not be the 2 (source and sink) being more/less (+ and -) similar ?
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I hope that a "PCA" is enough. I am not yet at the level where I can model actual geometry and derive a local convection coefficient from the flow pattern.
Lets see what FEMLAB says about this then go from there.
<Threadjack. >
Some parameters for modelling wb + TIM + diesim or CPU
Suggestions.
I will model a 1/4 waterblock.
All TIMs: k=11.5 w/m°C, L=0.1mm. This gives about 0.0604 °C/W for a 12x12mm and is an easy unit for L. <0.1 mm gets too complex to model efficiently.
Uniform flux, CPU 1mm thick, Die 10mm thick heatsource 100W heat flux=100/A W/m^2
Die size 1 10x10mm
Die size 2 12x12mm
Die size 3 14x14mm
Die size 4 30x30mm
BP thickness
BP 1 (storm) 1.2mm
BP 3 ... 2.0mm?
BP 4 ... 3.0mm??
BP 2 (MCW?) 5.0mm
Les I need a function to describe "h(eff)" relative flowrate and one constant which is the block figure of merit. This is to help me quickly change the modelled scenario. What do you think of h=kx^0.8? x being flowrate, k being WB FOM. These are only parameters for the model. h(eff) will be the same for a given flowrate on different BP thicknesses.
Maybe 4 different FOMs giving h(eff) as shown in attached chart
The permutations here are... lots.
Speak now before I get too far or forever hold your peace.
Edits: (there might be a few of these in the form of suggestions required/requested)
Edit1: Please suggest density and heat capacity for TIM
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