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Heat and Mass Transfer

Quick practice

Question 1 of 5

A fluid of viscosity 0.0012 \mathrm{~Pa}-\mathrm{s}, \mathrm{c}_{\mathrm{p}}=1.6 \mathrm{~kJ} / \mathrm{kgK} and thermal conductivity 1.2 W/mK is allowed to flow over an iron plate at 120^{\circ} \mathrm{C}. The hydrodynamic boundary layer thickness at a specified location on the plate is 0.9 mm. The thermal boundary layer thickness at same location is:-

A

0.21 mm

B

0.81 mm

C

0.94 mm

D

0.77 mm

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