Lost in the sea of CFD

Greg

What I looking for is a software application or package that has a pretty deep understanding of materials and interactions. What I need is a 3d visulization program that understands gas-solid interactions like absorption and saturation. I need to have the ability to use my own material properties for both the gas and the solid. For a seperate problem, it would also be nice if the software could simulate gas-elastic interatcions like filling a balloon up with helium. I still need to buy the workstation, so the software can be for any system. Currently, I'm looking at CFX-4 and 5.6, Algor professional multiphysics, and Moldflow Plastics Insight. Do you think these applications can handle the requirements? If not, or if you know of software better suited for these applications, I'd love to hear your recommendations.

Thanks for the attention span, Greg