The table below shows the list of the popular dimensionless numbers related to heat transfer.

Nusselt Number


characterizes heat exchange rate with fluid convection
Biot Number

characterizes heat exchange rate with solid bodies
Prandtl number

characterizes fluid in terms of its ability to develop heat convection against heat conduction  
Grashof number

characterizes the natural heat convection due to gravity
Rayleigh number

characterizes the natural heat convection due to gravity
Fourier number

dimensionless time


See also


Physics / Thermodynamics / Heat Transfer

Nusselt Number (Nu) ][ Prandtl number (Pr) ] [ Fourier number (Fo) ]