Dimensionless quantity characterising the heat exchange between solid body and surroundings:
| (1) | {\rm Bi} = \frac{U \cdot L}{\lambda} |
where
U | Heat Transfer Coefficient (HTC) between solid body and fluid |
|---|---|
\lambda | Thermal Conductivity of the solid body |
L | Characteristic length of Heat Transfer |
It determines the temperature transient behaviour and its gradient inside a solid body while it heats or cools over time.
See also
Physics / Thermodynamics / Heat Transfer
[ Dimensionless Heat Transfer Numbers ] [ Prandtl number ] [ Rayleigh number ] [ Reynolds number ] [ Nusselt number ]