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Custom PCB material Properties/ Thermal Dynamics

Question asked by Frank Phelps on Jan 18, 2015

Hi Guys,

Let me first give you a brief overview.  Our company creates custom industrial Computers.  We want to start using Solidworks Thermal Simulation to give us a ball park idea for our products, so our R&D/ Test department can have a starting point for their test in our high tech real world simulators.  When trying to start importing circuit boards and to run these simulations I run into 2 main problems.  1)  When bringing circuits over from Altium the transfer is never 100% accurate.  When bringing in these models some of the surfaces will be missing which in turn makes it hard to go back and correct all of the surfaces to give accurate readings for thermal simulation.  2)  When dealing with all of these individual circuits it would take a very long time to go back and input all of the information needed for thermal simulation when most of these were not done in Altium. 



What my plans are is to create Solid Model "envelopes" of the circuit boards and heat sinks used and give generalized ball park stats to solidoworks for simulation.  With all this being said here is my main starting point problem.  Since the PCB board and the circuits are not made out of the same material what is the  best way to simulate the heat transer/convection etc in the simulation when making my own library material.  Any other insights or thoughts on this "generalized thermal simulation" would be greatly appreciated.  I am not looking for EXTREME precision, but I would like to hold the highest precision possible for a turn around on these test of a few days.  This turn around time being measured after all of the generalized library parts have been created.  Thanks in advance for just reading this long post.  Thank you even more for your input and help.