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Heat transfer and insulated walls

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Old   January 30, 2020, 02:38
Default Heat transfer and insulated walls
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Hey

I'm trying to make a calculation of heat loss from a certain geometry. Parts of my geometry is insulated and the rest is steel.

I can't figure out if what I have done is correct, since my results are so non consistent.

On the curved surface (part of a cylinder) i have a flow flowing with a certain temperature (390 deg C) and through convection heating up my geometry.

I have put this in by convection film coefficient of 200 and the temperature.

Further I have drawn the free stream air which cools my geometry by convection and radiation (haven't put in radiation - wont work).

Inlet conditions 20 deg C and 1 m/s, pressure outlet.

I have attached a photo. https://imgur.com/a/AW0nKZP
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conduction, convection, heat losses


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