Lewis number
The Lewis number (Le, according to Warren Lewis) is a dimensionless parameter of physics.
In the heat and mass transfer, it represents the ratio of heat conduction to diffusion
- - Thermal conductivity in
- D - diffusion coefficient in
- - Isobaric specific heat capacity in
- - Density in
Expanding with the viscosity, the Lewis number can also as the quotient of Schmidt number (Sc ) and Prandtl number (Pr) represent: