Nusselt number is the ratio of the

The ratio of Nusselt number and the product of Reynold's number and Prandtl number is equal to

A

Stanton number

B

Biot number

C

Peclet number

D

Grashoff number

Nusselt number is a function of Prandtl number and __________ number of fluid in natural convection heat transfer.

A

Grashoff

B

Biot

C

Stantan

D

Reynolds

Nusselt number is the ratio of the temperature gradient at the wall to

A

Temperature difference

B

Heat flux

C

That across the entire pipe

D

None of these

Nusselt number/Biot number varies

A

inversely with thermal conductivity

B

directly with heat transfer co-efficient

C

directly with thermal conductivity

D

inversely with dimension of the solid

Nusselt number (for forced convection heat transfer) is a function of the __________ number.

A

Prandtl

B

Reynolds

C

Both A & B

D

Neither A nor B

Corresponding to Nusselt number in heat transfer, the dimensionless group in mass transfer is the __________ number.

A

Sherwood

B

Schmidt

C

Peclet

D

Stanton

If there are no externally induced flow velocities, then the Nusselt Number (Nu) does not depend upon

A

Prandtl number

B

Reynolds number

C

Grashof Number

D

none of the

In free convection heat transfer, Nusselt number is function of

A

Grashoff number and Reynold number

B

Grashoff number and Prandtl number

C

Prandtl number and Reynold number

D

Grashoff number, Prandtl number and Reynold number

The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe, where the wall heat flux is constant, is

A

2.36

B

4.36

C

120.36

D

Dependent on N_Re only

Nusselt number for full developed, laminar, constant property flow in a pipe at uniform heat flux is

A

0.72

B

4.364

C

18

D

83

Nusselt number is the ratio of the

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