A numerical flume for waves on variable sheared currents using smoothed particle hydrodynamics (SPH) with open boundaries

Combinations of waves and currents exist in a wide range marine environments. The resulting, often complex, combined wave-current conditions largely determine the loading, response survivability vessels, offshore platforms systems. Smoothed Particle Hydrodynamics (SPH) has becoming increasingly popular for free-surface flow problems which do not require special treatment to detect free surface. present work implements open boundaries within SPH-based DualSPHysics solver. Open are applied generation wave-alone, current-alone conditions. A modified damping zone acting on vertical velocity component is used wave absorption with allow particles leave or enter fluid domain when current exists. Results wave-alone (regular, irregular focused) (uniform, linearly sheared arbitrary sheared) test cases demonstrate general numerical flume achieved. Tests focused interacting validated analytical linear solutions surface elevation velocities, demonstrating excellent agreement. may be extended steep well suited SPH thus enable modelling complex extreme