Project ForgeHeat Transfer
Convection & Radiation
GATE 2014
Easy
Biot number signifies the ratio of
- Aconvective resistance in the fluid to conductive resistance in the solid
- conductive resistance in the solid to convective resistance in the fluid
- Cinertia force to viscous force in the fluid
- Dbuoyancy force to viscous force in the fluid
Explanation
Biot number Bi=hLc/k is defined as the ratio of internal conductive resistance within a solid (Lc/(kA)) to the external convective resistance at its surface (1/(hA)) — it determines whether the lumped-capacitance (uniform-temperature) assumption is valid.
Source: GATE ME 2014 (Session 1 / Set-1) (2014)
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