[sdiy] PCB heat simulations?

[ASSI]

On Wednesday 13 November 2013, 22:08:49, Mattias Rickardsson wrote:
> That's one of the things I'm considering - not a chimney per se, but a
> hole in another PCB placed above the hot component. The question is if
> it helps much. If there is considerably more convection upwards from
> the hot component, it will have effect to place the hole there. If the
> heat & convection forces are spread more evenly over the PCB area, it
> will have less effect, and other hole positions will not be better
> either.

The single most effective change in your arrangement would be to put the PCB 
stack vertical instead of horizontal.  Leaving a hole above a hot component 
is better than nothing, but certainly not as effective.  A pin-finned 
heatsink on the hot component protruding through the hole on the other hand 
would likely be a better arrangement than the same in open space (without 
the second PCB).  If you really must know, build yurself a thermal dummy and 
check the temperatures for a few variants.


Regards,
Achim.
-- 
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+

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