Chem Eng rate of heat transfer qts

AI Thread Summary
The discussion revolves around calculating the film temperature and the rate of heat transfer for engine oil flowing over a flat plate. The oil's initial temperature is 60°C, while the plate is at 20°C, with a flow velocity of 2 m/s and a plate length of 5m. Participants highlight the challenge of determining the Reynolds number without the oil's density, leading to confusion about the film temperature, which is suggested to be 40°C. Ultimately, it is confirmed that the film temperature is correct, and the lecturer's initial input was inaccurate. The density of the engine oil was later provided, allowing for further calculations.
tcaldwell
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Heat Transfer Qts
Engine oil at 60 oC flows over flat plate whose temperature is at 20 oC with a velocity of 2 m s-1. The length of the plate is 5m. What is the film temperature and the rate of heat transfer per unit width of the entire plate?
Additional information (at the film temperature):
Thermal conductivity of oil: Prandtl number:
Dynamic viscosity:
k1 = 0.144 W m-1 K-1
Pr = 2870
u = 0.21 kg m-1 s-1

Help!
Can't get a Reynolds number without density..
Is film temperature 40 degrees Celsius?
 
Engineering news on Phys.org
Qts solved...
Was right..lecturer wrong AGAIN..was then provided with engine oil density in qts
 

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