A fluid with a constant density of 961 kg/m3 and a constant viscosity of 1.419x10-3 Kg/m-s is flowing over a flat plate at a stream free velocity of 0.87 m/s. If the plate has a length of 2 m, answer the following: 1. What is Reynolds number at a point that is (1/4)L down the entrance? 2.Is the flow laminar or turbulent? 3.Calculate the thickness of the boundary layer in mm at (1/4)L down the entrance.

Q.dynamics of fluid.

Ql:- A 300 mm diameter of pipes and 350 mm long slides along a large diameter cylinder at a speed of 1.64 ft/s under the application of a force of 25 N in the inverse direction of its motion due to a film of oil between the cylinder and pipe. If the viscosity of oil 5 stokes and s.g 0.89, find the thickness of oil and the diameter of cylinder. Q2:- A- Calculate the capillary effect in a glass tube of 0.24 in diameter when immersed in mercury, of r.d is 13.6. Assume o to be 0.5 N/m for mercury. The contact angles for mercury is 130..

6c. Explain the fundamental reason for shear viscosity oxz by considering a fluid flowing along the x-axis with velocity v(z). How do thermal effects or turbulent flows lead to viscosity?