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Mahmoodi M, Shademani R, Gorji Bandpy M. Viscous Models Comparison in Water Impact of Twin 2D Falling Wedges Simulation by Different Numerical Solvers. ijmt 2018; 9 :1-13
URL: http://ijmt.ir/article-1-602-en.html
Viscous Models Comparison in Water Impact of Twin 2D Falling Wedges Simulation by Different Numerical Solvers
Mehdi Mahmoodi * 1, Roya Shademani2 , Mofid Gorji Bandpy1
1- Babol Noshirvani University of Technology
2- Amirkabir University of Technology
Abstract:   (7054 Views)
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.
Keywords: Falling Wedges, Two Phases, Phase Field, Volume of Fluid, Dynamic Mesh
Full-Text [PDF 1037 kb]   (2247 Downloads)    
Type of Study: Research Paper | Subject: Ship Hydrodynamic
Received: 2017/03/17 | Accepted: 2017/11/9
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