Mass Diffusion

Covered in Chapter 14, mass diffusion is the diffusion (or movement) of mass from a high concentration to an area low concentration.

Where is species A (a species is simply a grouping, it could be an element, chemical, or other) and is species B. The above variable is the diffusion of species A into species B.

Equation 14.14 (Slide 8 of ME3304 S24 Lecture Note (8) Mass Transfer):

Where is temperature in Kelvin, is mean speed of sound, is electron mean free path, is pressure, and is temperature.

See ME3304 S24 Lecture Note (8) Mass Transfer for more information.