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A fluid with kinematic viscosity v flows in laminar stage along a flat plate with freestream velocity V. At a distance x from the leading edge, the Reynolds number of the flow is given by R = Vx/v. The thickness of the boundary layer at x will be proportional to
Magnus effect may be used advantageously in games such as cricket, tennis, table tennis and golf. In order to obtain a lift, i.e. a rising curve for the trajectory of the ball, from left to right, the nature of the spin to be given is
Match List  I with List  ll and select the correct answer using the codes given below the lists:
A thin smooth plate 1 m wide and 2 m long is towed through water at a velocity of 2 m/s. Assuming that boundary remains laminar, then drag on both sides of the plate is (kinematic viscosity = 10^{6} m^{2}/s)
For a turbulent boundary layer (under zero pressure gradient), the velocity profile is described by the onefifth power law. What is the ratio of displacement thickness to boundary layer thickness?
The velocity distribution for flow over a plate is given by u = 0.5y  y^{2} where ‘u’ is the velocity in m/s at a distance ‘y’ meter above the plate. If the dynamic viscosity of the fluid is 0.9 Ns/m^{2}, then what is the shear stress at 0.20 m from the boundary?
A very tiny sphere is settling down in a viscous liquid at Reynold’s number = 0.2. Its drag coefficient will be
According to PrandtlBlassius relation, the thickness of boundary layer in turbulent flow is
where x = distance between leading edge of the body and the section where thickness of boundary layer is required.
R_{ex} = Reynold’s number at a distance x from the leading edge.
In which of the following the friction drag is generally larger than pressure drag?
31 docs280 tests

31 docs280 tests
