For flow over a flat plate the ratio of thermal boundary...

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For flow over a flat plate, the ratio of thermal boundary layer thickness, 'xt' and hydrodynamic boundary layer thickness 'x' is equal to (where, N_Pr = Prandtl number)

A. N_Pr

B. $${\text{N}}_{{\text{Pr}}}^{\frac{1}{3}}$$

C. $${\text{N}}_{{\text{Pr}}}^{ - 1}$$

D. $${\text{N}}_{{\text{Pr}}}^{ - \frac{1}{3}}$$

Answer: Option B

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