Water entry and exit of 2D and axisymmetric bodies

The present paper is dedicated to the development of a numerical model for water impact two-dimensional (2D) and axisymmetric bodies with imposed motion. work first step towards implementation 2D+t procedure be used analysis aircraft ditching. problem investigated under assumptions an inviscid incompressible fluid, which modeled by potential flow fully non-linear boundary conditions at free-surface. unsteady value free-surface numerically solved through element method, coupled simplified finite method describe thinnest part jet. study aimed describing entry exit phases. Specific solutions are developed tackle phase improve stability model. Results presented in terms shape, pressure distribution hydrodynamic load acting on impacting body. 2D wedge cone, or experimental results available literature. investigation shows that proposed accurately simulate both For phase, it shown model, being non-linear, provides much better prediction loads wetted area compared (analytical) approaches. effects gravity, usually missing approaches literature, also investigated, showing they rather important, especially, phase.