For the laminar flow of water oyer a sphere, the drag coefficient CF is defined as CF = F/( U D ), where F is the drag force, is the fluid density, U is the fluid velocity and D is the diameter of the sphere. The density of water is 1000 kg/m . When the diameter of the sphere is 100 mm and the fluid velocity is 2 m/ s, the drag coefficient is 0.5. If water now flows over another sphere of diameter 200 mm under dynamically similar conditions, the drag force (in N) on this sphere is _______.

For the laminar flow of water oyer a sphere, the drag coefficient CF i

1.	For the laminar flow of water oyer a sphere, the drag coefficient CF is defined as CF = F/( U D ), where F is the drag force, is the fluid density, U is the fluid velocity and D is the diameter of the sphere. The density of water is 1000 kg/m . When the diameter of the sphere is 100 mm and the fluid velocity is 2 m/ s, the drag coefficient is 0.5. If water now flows over another sphere of diameter 200 mm under dynamically similar conditions, the drag force (in N) on this sphere is _______.
A.	100N
B.	18N
C.	20N
D.	40N
Answer» D. 40N

Discussion

No Comment Found

Related MCQs

Consider the turbulent flow of a fluid through a circular pipe of diameter D.Identify the correct pair of statements. I. The fluid is well-mixed II. The fluid is unmixed III.ReD < 2300 IV. ReD > 2300
Match the following P: Compressible flowU: Reynolds numberQ: Free surface flowV: Nusselt numberR: Boundary layer flowW:Weber numberS: Pipe flowX: Froude numberT: Heat convectionY: Mach numberZ: Skin friction coefficient
The Newtonian fluid has the following velocity field: = x y + 2xy &jcirc; - yz k The rate shear deformation yz at the point x = 2, y = 1 and z = 2 for the given flow is
Water enters a circular pipe of length L = 5.0 m and diameter D = 0.20 m with Reynolds number ReD = 500. The velocity profile at the inlet of the pipe is uniform while it is parabolic at the exit. The Reynolds number at the exit of the pipe is_____
For the laminar flow of water oyer a sphere, the drag coefficient CF is defined as CF = F/( U D ), where F is the drag force, is the fluid density, U is the fluid velocity and D is the diameter of the sphere. The density of water is 1000 kg/m . When the diameter of the sphere is 100 mm and the fluid velocity is 2 m/ s, the drag coefficient is 0.5. If water now flows over another sphere of diameter 200 mm under dynamically similar conditions, the drag force (in N) on this sphere is _______.
Velocity vector of a flow field is given as = 2xy - x z&jcirc;. The vorticity vector at (1, 1, 1) is
The viscous laminar flow of air over a flat plate results in the formation of a boundary layer. The boundary layer thickness at the end of the plate of length L is L. When the plate length is increased to twice of its original length, the percentage change in Iaminar boundary layer thickness at the end of the plate (with respect to L) is ________
A fluid flow is represented by the velocity field = ax + ay&jcirc;, where a is a constant. The equation of stream line passing through a point (1, 2) is
Water flows through two different pipes A and B of the same circular cross-section but at different flow rates. The length of pipe A is 1.0 m and that of pipe B is 2.0 m. The flow in both the pipes is laminar and fully developed. If the frictional head loss across the length of the pipes is same, the ratio of volume flow rates QB /QA is _____ (round off to two decimal places)
Water (density = 1000 kg/m3) at ambient temperature flows through a horizontal pipe of uniform cross-section at the rate of 1 kg/s. If the pressure drop across the pipe is 100 kPa, the minimum power required to pump the water across the pipe, in Watt, is _______.

Discussion

No Comment Found

Related MCQs

Reply to Comment