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:

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de