Chemical Engineering - Heat Transfer - Discussion

Option C is the correct answer.

Conduction occurs in the buffer zone for a fluid flowing through a heated pipe only when the Prandtl number is greater than 0.6. The Prandtl number is a dimensionless quantity that characterizes the ratio of momentum diffusivity to thermal diffusivity.

A Prandtl number greater than 0.6 indicates that momentum diffusivity is greater than thermal diffusivity, which means that the fluid is more likely to transfer heat by conduction than by convection.

What about C? Please explain.

Option D - 1 is the right answer.

Pr>1: Viscous sub-layer.
Pr>0.6: Buffer zone.
Pr<0.6: Turbulent core.

I think D is the right Answer.

I agree 0.1 this right answer.

I think the right answer is d =1.