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Consider conditions for which a fluid with a free stream velocity of V = 1 m/s flows over an evaporating or subliming surface with a characteristic length of L = 1 m, providing an average mass transfer convection coefficient of hm, = 10-2 m/s. Calculate the dimensionless parameters ShL, Re L, Sc, and Jm for the following combinations: airflow over water, airflow over naphthalene, and warm glycerol over ice. Assume a fluid temperature of 300 K and a pressure of 1 atm.
one means of cooling in a hot dry climate is to use evaporative cooling where outside air is drawn into a unit where
compute the number of kilograms of hydrogen that pass through a 5-mm thick sheet of palladium having an area of 0.20 m2
consider a mass going through a polytropic process where pressure is directly proportional to volume n-1 the process
a 200-m-high 4-m-diameter stack emits 1000 kgs of 100 degree c gases into 5 degree c air. the prevailing wind velocity
water enters a wide flat channel of height 2h with a uniform velocity of u 5 ms. at the channel outlet the velocity
a coating that is known to behave as a bingham plastic is being applied to a vertical surface. derive a relationship
Describe a physically-plausible situation where the Reynolds number is (a) 1 (b) 10,000 (c) 1,000,000. For flow in tubes/pipes/ducts, use Red For flow over/along long/blunt objects, use Rel.
A system consisting of 2 kg of water initially at 160 C, 10 bar undergoes an internally reversible, isothermal expansion during which there is energy transfer by heat into the system of 2700 kj. Determine the final pressure, in bar, and the work, in ..
it is observed that the time for the ball to strike the ground at b is 2.5 s. determine the speed va and angle ua at
Consider a two- dimensional, straight triangular fin of Length L= 50mm and base thickness t= 20mm. The thermal conductivity of the fin is k= 25 W/mK. The base temperature is T_b= 50 degrees Celsius, and the fin is exposed to convection conditions cha..
A metal is being cast into a cylinder which is 10 cm in diameter and 20 cm tall. The mold is bottom-gated (see class notes for geometry)
you are blanking a square using a straight edge punch. if the punch is angled to be at a shear angle of 10 degrees how
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