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Thermal modeling of gearbox

Thermal modeling of gearbox

Thermal modeling of gearbox

(OP)
Hello,

I'm looking at the possibility of calculating the steady-state temperature condition of a gearbox.  In this case I believe nearly all of the heat is transmitted to the oil then to the drive housing, and of course natural convection from the housing to the air.

I have a few questions:
1) I'm using Mechanica, and the heat load methods I've tried result in very high temperatures in the core of the oil.  The oil is actually very well agitated and thus uniform in temperature.  How might I model the oil more accurately?

2) Is it reasonable to neglect the heat transfer of the airspace above the oil?

3) Any tips for making reasonable assumptions or tips on where the sensitivity of the analysis tends to be highest.

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