Project ForgeHeat Transfer
Conduction
GATE 2009
Easy
During the transient convective cooling of a solid object, Biot number → 0 indicates
- uniform temperature throughout the object
- Bnegligible convection at the surface of the object
- Csignificant thermal resistance within the object
- Dsignificant temperature gradient within the object
Explanation
Bi→0 means the object's internal conductive resistance is negligible compared to external convective resistance — the lumped capacitance limit, where the object has essentially uniform temperature throughout at any instant.
Source: GATE CH 2009 (2009)
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