Question

In respect to free convection over a vertical flat plate, the Nusselt number for laminar and turbulent flows varies respectively with Grashoff number G    r as

(a) G r and G r^1/4

(b) G r^1/2 and G r^1/3

(c) G r^1/4 and G r^1/3

(d) G r^1/3 and G r^1/4

This question was posed to me in examination.

I would like to ask this question from Correlations for Free Convection in division Diffusion in Solids and Molecular Diffusion in Fluids of Mass Transfer

Answer 1

Correct answer is (c) G r^1/4 and G r^1/3

To explain I would say: It varies as G r^1/4 and G r^1/3.