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-sur...

This work numerically evaluates the role of advancing velocity on water entry rigid wedges, highlighting its influence development underpressure at fluid–structure interface, which can eventually lead to fluid detachment or cavity formation, depending geometry. A coupled FEM–SPH numerical model is implemented within LS-DYNA, and three types asymmetric impacts are treated: (I) symmetric wedges w...

The airflow physics in the cavity during entry of a symmetric wedge into water are investigated experimentally using flow visualization techniques and particle image velocimetry (PIV) measurements. spatial temporal evolutions velocity presented. Smoke indicates some small-scale phenomena like secondary vortexes, free shear layers, Kelvin–Helmholtz (K-H) instabilities within cavity. information ...

Phospholipid force fields are of ample importance for the simulation of artificial bilayers, membranes, and also for the simulation of integral membrane proteins. Here, we compare the two most applied atomic force fields for phospholipids, the all-atom CHARMM27 and the united atom Berger force field, with a newly developed all-atom generalized AMBER force field (GAFF) for dioleoylphosphatidylch...

This paper reports a numerical study on the force convection heat transfer and flow characteristics of a nanofluid containing water and Tio2 with various volume fractions (0.002