Visualizing Diffusional Flux: The Time-Dependent Gradient Field

Flux is a vector that points in the direction of the flow  and is a measure of how much is flowing per unit time. This is Fick's first law.

An example of the vector field as a function of position at time = 0.8

An example of the vector field as a function of position at time = 0.2, but with more control over the appearance of the arrows.

Created by Wolfram Mathematica 6.0  (17 September 2007)