Air–water mixing characteristics between catamaran floats of an amphibious aircraft using the moving particle semi-implicit method

Fluid–Structure Interaction (FSI) on the water surface is a complex and inevitable phenomenon in ocean engineering. The Moving Particle Semi-implicit (MPS) method, based on the Lagrangian approach, can effectively simulate air–water mixing during the ditching process of a catamaran amphibious aircraft. This study primarily focuses on the interaction between air and water particles from a 3D perspective using grid probe technique to map the fluids interactions. The results highlight the potential for advanced development in air–water mixing on the free surface using particle-based methods around the catamaran floats of an amphibious aircraft specifically. The accuracy of this study is validated through experimental work performed by the National Research and Innovation Agency of Indonesia using seaplane floats for comparison and flat plate ditching case. Finally, the hydrodynamic properties and behavior of the catamaran seaplane at various velocities are determined both qualitatively and quantitatively.