For a laminar flow of a liquid metal over a flat plate, the thicknesses of the velocity and thermal

Q. For a laminar flow of a liquid metal over a flat plate, the thicknesses of the velocity and thermal boundary layers are 𝛿𝑣 and 𝛿𝑡 respectively. Kinematic viscosity (viscosity/density) of liquid metal is significantly lower than its thermal diffusivity [thermal conductivity / (density × specific heat)]. Based on this information, pick the correct option.

(Note: The temperature of the liquid metal is different from that of the plate).

(A) 𝛿𝑣 < 𝛿𝑡                                                                  (B) 𝛿𝑣 > 𝛿𝑡

(C) 𝛿𝑣 = 𝛿𝑡                                                                   (D) Information insufficient

Ans: Option A