Related Questions

The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is (where R is radius of pipe)
A 0.223 R
B 0.423 R
C 0.577 R
D 0.707 R
The ratio of the thickness of thermal boundary layer to the thickness of hydrodynamic boundary layer is equal to (Prandtl number) n, where n is equal to
A $$ - \frac{1}{3}$$
B $$ - \frac{2}{3}$$
C 1
D $$-1$$
The ratio of hydrodynamic boundary layer to thermal boundary layer thickness in case of liquid metals is
A [

A.

B. 1

B > 1
C 2
Thickness of thermal boundary layer is more compared to that of hydrodynamic boundary layer, when the value of Prandtl number is
A 1
B > 1
C > 5
For turbulent flow in smooth circular pipe, the velocity distribution is a function of the distance 'd' measured from the wall of the pipe and the friction velocity 'v', and it follows a __________ relationship.
A Logarithmic
B Linear
C Hyperbolic
D Parabolic
The velocity, concentration and temperature boundary, for the boundary layer development on a flat plate during connective mass transfer will be same, if
A NSc = 1
B NSc = NPr = NLe
C NPr = NLe
D NSc = NLe
In convection heat transfer from hot flue gases to water tube, even though flow may be turbulent, a laminar flow region (boundary layer of film) exists close to the tube. The heat transfer through this film takes place by
A Convection
B Radiation
C Conduction
D Both convection and conduction
What is the ratio of displacement thickness to nominal thickness for a linear distribution of velocity in the boundary layer on a flat plate?
A 0.5
B 1
C 1.5
D 2
Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at layer _____. Word processing operates at layer _____.
A 3, 3, 1, 7
B 3, 2, 1, none
C 3, 2, 1, 7
D 3, 3, 2, none
E All of the above
The effect of solid boundary on the fluid flow is confined to the boundary layer, except for fluids
A Having high viscosities
B Moving at low velocities
C Both A and B
D Neither A nor B

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