DIFFUSION COEFFICIENT
Definition
A <DIFFUSION COEFFICIENT> is a <Property> that is a proportionality constant between the molar flux due to molecular diffusion and the gradient in A <CONCENTRATION> of the species (or the driving force for diffusion given by )C_B [v_B] = - D grad C_B where C_B is the local molecular <CONCENTRATION> of substance B in the mixture and [v_B] is the local <AVERAGE VELOCITY> of molecules of B