Volume 14, Issue 27 (7-2018)                   2018, 14(27): 35-48 | Back to browse issues page

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Taghizadeh Valdi M H, Atrechian M R, Jafary Shalkoohy A, Chavoshi E. Numerical and Experimental Study of a Spherical Projectile Water Entry Problem and Investigation of Mass and Impact Velocity Effect on Pinch-off Time and Depth. Journal Of Marine Engineering. 2018; 14 (27) :35-48
URL: http://marine-eng.ir/article-1-662-en.html
Zanjan Branch, Islamic Azad University
Abstract:   (666 Views)
The water entry problem of spherical projectile is simulated numerically and experimentally in this study. An explicit dynamic analysis method is employed to model the fluid-structure interaction using a Coupled Eulerian-Lagrangian (CEL) formulation that is available in finite element code Abaqus. The comparison of the numerical simulation results including displacement and velocity variations of spherical projectile in water depth as a function of time, with the theoretical results, indicates a good match between these results and the precision and applicability of the numerical algorithm used. The results reveal that pinch-off time is a very weak function of projectile mass and impact velocity on free water surface; while the pinch-off depth significantly increases along with increased this parameters. Additionally, the projectile mass has a subtle effect on viscous dissipation energy, while increasing the impact velocity on free water surface leads to decrese in dissipation energy.
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Type of Study: Research Paper | Subject: Offshore Hydrodynamic
Received: 2018/03/27 | Accepted: 2018/06/9

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