Hydrodynamic Performance of a Catamaran in Shallow Waters

The effects of limited water depth on the hydrodynamic performance a catamaran with full-scale dimensions and geometry WAM-V 16 unmanned surface vehicle operating in shallow waters are investigated using an incompressible URANS-VOF solver OpenFOAM®. Simulations flow associated passage have been conducted for range speed several to intermediate depths under free trim sinkage conditions. resistance dynamic motion characterized. total coefficient is shown increase by as much over 40% at transcritical Froude numbers, close critical depth-dependent number (Frh=1.0). wave system examined its relationship observed impacts resistance, discussed. effect Kelvin’s wake angle characterized terms both length numbers be good agreement theory.