Stagnation, not the land of male deer, more the tendency for something not to flow. Still brown dirty pools spring to mind (a spring being what they need most). Normally applied to air flow, a stagnation point is a point at which there is no flow whereas there is flow around it. Not knowing what your experiences are I don’t know whether to make an analogy to the middle of the eye of a hurricane or to … Read More
Talk to a mathematician about thermodynamics and heat transfer and before long they’ll be showing you lots of weird symbols in a rather condensed vector notation. Talk to a physicist and such concepts of electron spin states will lead the discussion. Talk to a mechanical engineer and likely analogies will be used that take a well known system or process and apply that to the concept of heat flow. … Read More
Tags: Power Dissipation, Electronics Cooling, Thermal Resistance
Many analogies exist relating heat flow to fluid flow. Oops, there’s one. A good electronics thermal design is one that gets the heat out from the heat sources quickly and the cold in to quench them quickly. Before I scoot off to sunny (though heavy rain is forecast) Devon for a family holiday I thought I’d leave you with this…
Thermal power dissipation is measured in Watts (W)
A Watt is a Joule/second … Read More
Tags: Temperature, Power Dissipation
Thought I’d follow the previous post on this subject up with a slightly more detailed description of exactly how to set-up a model with a fixed temp die and observe the resulting simulated power dissipation. “Hey Robin, this should really be done as a AppNote on SupportNet”. Can’t argue with that but posting it here as well will give everyone a glimpse of the actual operation of FloTHERM and FloTHERM.PCB.
So, … Read More
Electronic thermal simulations are most commonly formed by specifying a power dissipation within a package and using numerical solution techniques to derive what the resulting temperatures are within and around the package, PCB etc. If the package temperature is too high you’ve got issues that you’ll need to resolve via various thermal management approaches. You can turn the model definition on its … Read More
The original business case that David Tatchell and Harvey Rosten put forward for the formation of (what was to become) Flomerics had the following quote on its front page:
"All models are wrong, but some are useful"
G. E. Box
This sentiment has underpinned the approach my colleagues and I have always taken in the packaging up of computational fluid dynamics technology for the thermal simulation of … Read More
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