There is fluid film with thickness of h between two flat plates. The upper plate moves to the right atspeed of U. The lower plate is stationary.

a. Find the velocity profile for flow between flat plates. Use Navier-Stokesequations. Provide a detailed solution. Specify all simplifying assumptions that you make, and clarify how each assumption simplifies the problem.
b. Draw the velocity profile for dp/dx= -5 Pa/m
c. Draw the velocity profile for dp/dx= +5 Pa/m

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false