Project ForgeHeat Transfer
Conduction
GATE 2010
Medium
The ratio of Nusselt number to Biot number is
- conductive resistance of fluid / conductive resistance of solid
- Bconductive resistance of fluid / convective resistance of fluid
- Cconductive resistance of solid / conductive resistance of fluid
- Dunity
Explanation
Nu=hL/kfluid and Bi=hL/ksolid. Their ratio Nu/Bi=ksolid/kfluid, which equals the ratio of conductive resistances (L/kfluidA)/(L/ksolidA) = conductive resistance of fluid / conductive resistance of solid.
Source: GATE CH 2010 (2010)
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