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08000CE203122003

meter gives readings of 21 14/ണ്‌ and 11 N/cm? repectively. Co-efficient of
discharge for the orifice meter is given as 0.6. Find the discharge of water through
the pipe.
Water flows over a rectangular weir of 1.2m wide and depth of water over it is
16.5cm.The water coming out from the weir passes through a right angled
triangular weir .Find the depth of water over the triangular weir .Take ಲೈ for
rectangular and triangular weir as 0.62 and 0.6 respectively.
PART ^

Answer any two full questions, each carries20 marks.
Three pipes of length 800m, 500m and 400 ൩ and of diameters 500mm,400mm
and 300mm respectively are connected in series. These pipes are to be replaced by
a single pipe of length 1700m.Find the diameter of the single pipe.
Derive the Hagen —Poiseulle equation for laminar flow in circular pipes.
Define the following: i) Laminar boundary layer ii) Turbulent boundary layer iii)
Laminar sub layer
What is meant by boundary layer separation? What is the effect of pressure
gradient on boundary layer separation
Derive Darchy- Weisbach equation for head loss due to friction in pipes
Air flows over a flat plate 1m long at a velocity of 6m/s. Determine boundary
layer thickness at the end of the plate, shear stress at the middle of the plate and
total drag per unit length on the sides of the plate. Take density of air -1.2kg/m?

and kinematic viscosity of air- 0.15x10“m*/s

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