ABSTRACT
The tremendous advances in computing power that have occurred over the last several decades have enabled the development of complex computational algorithms that could permit much improved solutions to these challenging problems. However, even with this greatly increased power, practical codes wi l l still require many simplifying assumptions, especially for design. The predictions can be improved by creating codes that simulate the actual physical mechanisms. It needs to be determined which mechanisms need be simulated and to what level of accuracy? Improving these simulations w i l l require close cooperation among computational, theoretical, and experimental researchers and engineers.
