Transport Phenomena II


Understanding of mass transfer fundamentals. Mathematical formulation of mass transfer problems for different geometries.Evaluation of diffusion coefficients and mass transfer coefficients. 

General characterization





Responsible teacher

Isabel Maria Rola Coelhoso


Weekly - 4

Total - 70

Teaching language



Available soon


Cussler, E.L., " Diffusion: mass transfer in fluid systems", 3rd ed., Cambridge University Press, UK, 2009.


Bird, R.B.; Stewart, W.E.; Lightfoot, E. N. Transport Phenomena. 2nd ed. J Wiley & Sons, 2007.


Welty, J.R; Wicks, C.E.; Wilson, R.E.; Rorrer G.L. Fundamentals of momentum, heat and mass transfer. 5th ed. John Wiley &Sons, Inc, N.Y., 2010.


Teaching method

Available soon

Evaluation method

Available soon

Subject matter

  1. Fundamentals of mass transfer. Definitions of concentrations, velocity and flux; Fick’s first law. Nernst-Planck equation. Diffusion coefficients; Methods for estimating diffusion coefficients. Diffusion of ionic species. Multicomponent diffusion.
  2. Differential equations of mass transfer. Boundary conditions. Steady state molecular diffusion; Diffusion through a stagnant film; Equimolal counterdiffusion;
  3. Diffusion with heterogeneous chemical reaction. Pseudo steady state diffusion.
  4. Unsteady state molecular diffusion. Stefan-Maxwell equations. Analytical solutions of Fick’s secondlaw.
  5. Convective mass transfer; Dimensional Analysis; Concentration boundary layer; Models and analogies of Reynolds and Chilton-Colburn; Empirical correlations.
  6. Interphase mass transfer; Equilibrium gas- liquid and liquid- liquid; Two-resistance theory; Overall and individual mass transfer coefficients.
  7. Diffusion with homogeneous chemical reaction; Hatta number; First and second order reactions.


Programs where the course is taught: