Viscosity effect on an underwater vehicle-free surface hydrodynamic interaction

摘要: Abstract The present paper aims to explore and gain more knowledge about the viscosity effect on a shallowly submerged UV hydrodynamics. For this purpose, hydrodynamic drift tests are performed generic SUBOFF geometry using URANS equations with Reynolds stress turbulence model Euler available in commercial code STARCCM+. simulations conducted for angles ranging from β = 0 18 . 11 ∘ at Froude number equal F n 0.512 two different scenarios: without presence of free surface. surface both submergence depth h 1.1 D (D: maximum diameter), while carried out only equations. Although appear predict reasonably well contribution axial lateral forces acting UV, further analysis results reveals that, generally, has non-negligible influence hydrodynamics and, consequently, loads UV. This is true even zero incidence respect incoming flow, where expected provide satisfactory due absence large flow separation over