F- In a circular pipe of diameter 100 mm a fluid of viscosity (7) poise and sp. gr. 1.3 is flowing. If the maximum shear stress at the wall of the pipe is 196.2 N/m2, Then Flow will be: * Transient O Turbulent O None of the above

1. SAE 10 oil at 20°C (p = 869 kg/m3, /z = 8.14 x 10"2 N-s/m2) flows in a 200-mm-diameter pipe. Findthe maximum velocity for which the flow will be laminar.  [Indicate the formula used in determining the friction factor. (Colebrook Equation, Haaland Equation, andor Swamee Jain Equation). If not given, Use properties of fluid based ontemperature available ontheinternet.E.g. (density, viscosity)Apply roughness of pipe values from https://www.pipeflow.com/pipe-pressure-drop-calculations/pipe-roughness]

HW6_Question 2. Consider fully developed laminar flow in the annulus between two concentric pipes. The radius of the two pipes are ro and rj. The outer pipe is stationary, and the inner pipe moves in the x direction with speed Vo. Assume the axial pressure gradient is zero: %3D • Öx Obtain an expression for the velocity profile, u(r), and find out the value of u(r) in the middle of the annulus: (r = ) ro=2 cm, r;=1 cm, Vo = 0.3 m/s.

Q1: An oil with a viscosity of µ=| 0.37 N.s and density p=860- kg flows in a m? pipe of diameter D= (0.035) m. Find a) What pressure drop, R-P,, is needed to produce a flow rate of Q= (4.0*105) m³ if the pipe is horizontal with X, = 0 and X, = 17 m ? b) How steep a hill, must be pipe be on if the oil is flow through the pipe at the same rate as in part (a), but with P =P,? c) For the conditions of part (b) if P = 200 kpawhat is the pressure at section X = 6m, where x is measured along the pipe? Find. N Арat L —> 6т —()