Above: Remote monitoring of a suite of sources, both man-made and naturally occurring, are of interest to military and other government agencies. One such monitoring technology uses infrasound, or sub-audible acoustics, which can propagate tens to thousands of kilometers depending on source strength without losing signal character.

As everyone knows, modelling can produce  the solution for the most sophosticated software. So he said yes please to an offer of the Comsol Conference disc of user presentations and proceedings.

It's a wow, with an impressive chunk of happy sponsors, such as MatWeb, Altasim, Microsoft, Spaceclaim, SGI, TotaLinux, not to mention an impressed number of physics, design, technology and science journals.

Anyone who wants to create and import geometries, mesh, use solvers, post process and more should have a look at the COMSOL approach. You can even sign up for a training course.

Below: Simulation of the polymer as it fills the mold cavity after 20s, 40s, 100s and 3000s. The red isosurface shows where the boundary between polymer mixture and air occurs, the green isosurface indicates where volume fraction between two polymers is at 50%, while the blue isosurface is where the second polymer has a volume fraction of 100%. Note that some of the mold cavity walls have been removed for illustrative purposes.