Physical testing of fully-submerged vehicles is both complex and highly expensive, particularly at larger model scales; CFD methods have, therefore, long been used to investigate and understand simpler, steady-state hydrodynamic problems. However, advances in CFD methodology and computational power mean that simulation of more challenging, transient flows is now possible. Several recent AVT RTGs have shown the potential of such approaches and generated a huge amount of data and understanding, but many questions remain unanswered.
Assess the ability, maturity and applicability of state-of-the art viscous flow solvers to predict the hydrodynamic performance of a manoeuvring submarine at straight flight, steady drift and during a constant-rate manoeuver. The use of a single baseline geometry and a limited number of test cases is intended to allow a thorough understanding of the fluid dynamic processes to be achieved and a high degree of information and results interchange and collaborative working between partners.