en Ship Hydrodynamic مقاله پژوهشي Research Paper In this paper, symmetric water entry of twin wedges is investigated for deadrise angle of 30 degree. Three numerical simulation of a symmetric impact, considering rigid body dynamic equations of motion in two-phase flow is presented. The two-phase flow around the wedges is solved by Finite Element based on Finite Volume method (FEM-FVM) which is used in conjunction with Volume of Fluid (VOF) scheme in ANSYS Fluent and ANSYS CFX and Phase Field scheme in COMSOL Multiphysics. The method and scheme of simulation are validated by experimental data for geometry with one wedge. The dynamic mesh, mesh motion and moving mesh models are used to simulate dynamic motion of the wedges in ANSYS Fluent, ANSYS CFX and COMSOL Multiphysics, respectively. The vertical velocity and pressure coefficient versus time are determined and comparisons of the computed mentioned parameters against experimental data are performed. The eight characteristics effects of fluid flow are investigated till 0.25 second after wedges falling including impact event. It is demonstrated that the ANSYS Fluent and k-ε were the best software and viscous model, respectively. Falling Wedges, Two Phases, Phase Field, Volume of Fluid, Dynamic Mesh 1 13 http://ijmt.ir/browse.php?a_code=A-10-853-1&slc_lang=en&sid=1 Mehdi Mahmoodi mehdymahmoody@gmail.com 10031947532846003171 10031947532846003171 Yes Babol Noshirvani University of Technology Roya Shademani shdmn@aut.ac.ir 10031947532846003172 10031947532846003172 No Amirkabir University of Technology Mofid Gorji Bandpy gorji@nit.ac.ir 10031947532846003173 10031947532846003173 No Babol Noshirvani University of Technology