AnsweredAssumed Answered

Wide temperature range

Question asked by Robert Ellett on Jul 25, 2014
Latest reply on Jul 29, 2014 by Jared Conway

Has anyone seen a flow study where the average temperature would be something that is expected, but the maximum temperature is completely unrealistic. Recent studies I've run have had average temperatures at 80C, or less in most cases, but as high as 2700C. No, that is not an extra zero. There isn't any possible way a 13W volume heat source can heat up a metal can (in this case the air around it) to 2700C, so what is wrong with my setup? 

Here are my settings for the internal study

Heat conduction in solids, checked

Exclude cavities without flow conditions, unchecked

Gravity, checked

Fluids (gases), Air

Flow type, laminar and turbulent

Default solid, Insulator

Default outer wall, Heat transfer coefficient, 5.5 W/m^2/K

Temperature of external fluid, 24.05C

Initial conditions, pressure 14.6959473 lbf/in^2, pressure potential checked, temperature, 24.05C

Initial Mesh, Default

All solid bodies had material assigned. Mild steel was assigned to the metal can, electronics (PCB material assigned) are inside the metal can, inside a ventilated ABS plastic housing.

Those are the settings. If anyone has any ideas please let me know.

FYI - file is too big to attach

Thank You

Robert

Outcomes