For example in your rented house, the hot fluid is stored in a
large tank as high as 0.4 m. Assume the tank thickness is very thin
so it's mode
conduction heat transfer can be ignored. If the hot fluid has a
temperature of 40 C and is allowed to cool naturally at an outside
air temperature of 14
C, then determine the average convection
coefficient, average heat transfer rate and thickness of the
boundary layer at the top of the tank!

For example in your rented house, the hot fluid is stored in a large tank as...
You are given a small pipe with a diameter of 1 mm flowing
cooling fluid (water) at a temperature of 20C. Fluid flow velocity
is regulated at a constant speed
of 0.2 m / s and assumed to be uniform. If the pipe surface is
given a constant heat flux
of 6000 W / m2
and you assume the analysis is done in a fully develop area,
then
based on your design calculations, at what length of the pipe
(measured...