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Heat Transfer
Convection
GATE 2016
Medium

Match the dimensionless number in Group-1 with its ratio in Group-2. Group-1: P-Biot number, Q-Schmidt number, R-Grashof number. Group-2: I-buoyancy force/viscous force, II-internal thermal resistance of a solid/boundary layer thermal resistance, III-momentum diffusivity/mass diffusivity. The correct combination is

  • AP-II, Q-I, R-III
  • BP-I, Q-III, R-II
  • CP-III, Q-I, R-II
  • P-II, Q-III, R-I

Explanation

Biot number = internal/boundary-layer thermal resistance ratio (II). Schmidt number = momentum/mass diffusivity (III). Grashof number ∝ buoyancy/viscous force (I).

Source: GATE CH 2016 (2016)

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