Full 3D solution of the wave equation with two impulsive point sources.

Mixing of two fluids is modeled in 3D using a combination of advection and diffusion. The velocity field is specified by using the analytical solution from recent literature. These problems are of particular importance to designers of 'lab-on-a-chip' type devices.

The solution of the Scott-Gray equations describe the reaction and diffusion of two chemical species. This highly non-linear system produces many interesting patterns including spots!