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Originally Posted by Les
Still feeling my way round .
Note the gold bit is 400w/mc Cu ( I use 400 as default)
With what are the holes filled ?
k appears to be ~214.5, Al?
Don't bother answering until have added further queries - which I probably will.
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The holes in the real world are filled with: the thermistor, some AS Ceramique and a 3mm wooden plug drilled through the centre (for the wires) 0.5mm. In the model values of these are:
k=1, density=1000, heat capacity=1000
Guesses, the results are almost exactly the same with nothing in the holes. The gradient from which I guess you are calculating the k is established more by the temperatures at each end than the material itself.
Here's a more comprehensive model raw data result from WB interface down, 0mm is FB/die interface. I have used k copper =392 in this model. Nom gradient 1.65°C/mm.
I will use this model I think, it'll save a bit of work despite my reservations expressed above. I'll stick with die, FB centerline temps as well unless something else comes up. I'll have something based on this tomorrow.
Edit: Added working for final position corrections