the drag force of the flow over aplate with a.v.p. of Sinπy/2δ ? [

P1 A thin layer of water flows down a plate inclined to the horizontal with an angle a = 15° in the shown coordinate system. If the thickness of the water layer is a=0.5 mm, assuming that the flow is laminar and incompressible, (water density p = 1000 kg/m³viscosity µ = 0.001 Pa.s and acceleration of gravity g = 9.81 m/s²) and an air flow shears the layer in a direction opposite to its flow with a shear stress of 1 N /m². Solve the Navier-Stokes equation: air water (a) to find the value of the maximum water velocity in m/s to three decimal points, Answer: (b)and to find the value of water velocity at the layer's surface in m/s to three decimal points, Answer:

Fluid mechanics

An infinitely long cylindrical container has a cross section area of radius R, and is placed horizontally with gravity being in the −y direction, as shown in the figure. The cylinder is 50% filled with water (the shaded part), with density ρ. The other 50% of the volume in the cylinder is filled with air with constant pressure of p = p0. The length of the cylindrical container in the axial direction is W. c) Use control volume analysis and divergence theorem on the 4th quadrant water volume to compute the hydrostatic force acted on  the 4th quadrant of the cylinder wall, as shown by the thickened line in the figure.