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02000CH205092001

PART B

Answer any two full questions, each carries 15 marks.
If a stream function exists for the velocity field of u=a(x?—y?),v=

—2axy,w = 0 find it.
If the stream function is 0 = 62८31 + 12xy%, determine the velocity vector
assuming w = 0.
Water is draining from an open conical funnel at the same rate at which it is
entering at the top. The diameter of the funnel is 6 cm at the top and 1 cm at the
bottom and it is 5 cm high. The mass flow rate of water is 50 kg/h. Determine the
volumetric flow rate of the water and the value of the Reynolds number entering
and leaving the funnel?
Water flowing in Potential flow with velocity 2 m/s, suddenly it comes in contact
with infinite plate. Determine the length to which laminar flow will be there.
Estimate the boundary layer thickness for the above distance. Estimate the
distance from the leading edge where there will be turbulent core.
Water is flowing from one large tank to another through a 5 cm diameter pipe.
The level in tank A is 20 m above the level in tank B. The gauge pressure above
the water in tank A is 0.5 Pa, and in tank B it is 2 Pa. Which direction is the water
flowing?
The accepted transition Reynolds number for flow in a circular pipe 18 Regrit =
2100. For flow through a 5 cm diameter pipe, at what velocity will this occur at
20 °C for (a) air flow and (6) water flow?
List an example for Streamlines, Path lines, Streak lines, and Time lines.
Stating the assumptions, derive Bernoulli’s equation.
PART ©

Answer any two full questions, each carries 20 marks.

Draw the sketch of rotameter.

An oil of specific gravity 0.8 is flowing through a horizontal venturimeter having

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