Transport mechanisms

Introduction
Molecular diffusion in a medium
Transfer accross phase boundaries
Examples for application
Advective and dispersive transport
References and links

Selftest
     Question 1
     Question 2
     Question 3
           Answer
Problems

Question 3

Why does the diffsuion applet https://netfiles.uiuc.edu/valocchi/gw_applets/spherical/sphericalGUI.html not contain any units for distance, time and diffusion coefficient?