Related Questions

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
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
At the point of boundary layer separation in fluid flow, the
A Shear stress is maximum
B Velocity gradient is flat
C Density variation is maximum
D Shear stress is zero
Boundary layer separation is characterised by one of the conditions given below, where 'Re' is the Reynolds number for the flow. Select the appropriate conditions.
A [

A. Re

B. Re >> 1, accelerating flow

B Re
C Re >>1, decelerating flow
In fluid flow, the boundary layer separation can not occur
A In case of boundaries experiencing form drag
B At points of abrupt changes in the flow directions
C In laminar flow
D None of these
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
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
The region between the separation streamline and the boundary surface of the solid body is known as
A wake
B drag
C lift
D boundary layer

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