[hugolol]

Hi!

I'm currently doing my master thesis and trying to do a thermal analysis on electronic equipment in SolidWorks Flow Simulation environment. I'm having problems figuring out how to put the default wall thermal conditions and boundary conditions if the electronic appliance have no fans and is air tight, as it has an IP-classification. I want to test how it heats up due to heat dissipation from the electrical components inside, in an environment with 23 degrees celsius ambient temp still air.

Any clues, since the tutorials only speak about fans and forced convection? The encasing of the equipment is PC ABS.

Any discussion or suggestion is highly welcomed!

[Boris_M]

If you want to consider the natural convection on the exterior as well, you should use an external analysis, then you get the internal and external air automatically by default.
If you only want to run it internally, you should un-check the "Exclude cavities without flow conditions". This basically says that if you don't apply a flow boundary condition the cavity is not filled with fluid. If you uncheck this, then all cavities are filled with the default fluid.

I'm not sure what your problem with the default wall thermal condition is. In case of an internal simulation all external walls are the "Default outer wall thermal condition" and in case of an external simulation, these "outer" walls are handles by the fluid on the outer wall as it is an external simulation. So there is no need to apply a default boundary condition for that if there is actual flow on the outside.

hope this helps,
Boris