Analysis of the Dynamical Behaviour of an Offshore Supply Vessel With Water on Deck

This paper describes a study of the influence of the water on deck on the dynamical behavior of an offshore supply vessel with a large open aft deck. The deck under certain load and sea conditions can become partially or totally immersed. This study focuses on the roll motion that can be of large amplitude and therefore has implications and risks for the ship’s safety. The Glimm’s method is used to model the three-dimensional flow of shallow water on the deck. A parametric study is made in order to show the effect of the relevant parameters. It is shown that the water on deck has a significant influence on the ship’s dynamical response.

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Flow Structure with Natural Convection in Inclined Air-Filled Enclosures

Journal of Heat Transfer ◽

10.1115/1.3244498 ◽

1981 ◽

Vol 103 (3) ◽

pp. 535-539 ◽

Cited By ~ 37

Author(s):

S. J. M. Linthorst ◽

W. M. M. Schinkel ◽

C. J. Hoogendoorn

Keyword(s):

Natural Convection ◽

Three Dimensional ◽

Side Wall ◽

Stationary Flow ◽

Flow Structures ◽

Convection Flow ◽

Nonstationary Flow ◽

Three Dimensional Flow ◽

Natural Convection Flow ◽

Made In

Flow visualization observations are described for natural convection flow in rectangular inclined enclosures. Observations are made in air-filled enclosures of small and moderate aspect ratio (0.25 ⩽ Ax ⩽ 7), angles of inclination from 0 to 90 deg and Rayleigh number between 5 × 103 and 2.5 × 105. For the range of parameters considered we determined the transition from stationary to nonstationary flow and the transition from two-dimensional to three-dimensional flow. Also, the different stationary flow structures are described. In addition measurements of the velocity profile of the stationary flow have been performed by means of a laser doppler anemometer. Special attention has been given to the side wall boundary condition of the enclosure.

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Three-dimensional flow of Eyring Powell nanofluid over an exponentially stretching sheet

International Journal of Numerical Methods for Heat &amp Fluid Flow ◽

10.1108/hff-05-2014-0118 ◽

2015 ◽

Vol 25 (3) ◽

pp. 593-616 ◽

Cited By ~ 19

Author(s):

Tasawar Hayat ◽

Bilal Ashraf ◽

Sabir Ali Shehzad ◽

Elbaz Abouelmagd

Keyword(s):

Differential Equations ◽

Stretching Sheet ◽

Three Dimensional ◽

Physical Parameters ◽

Stretching Surface ◽

Three Dimensional Flow ◽

Content Type ◽

Exponentially Stretching Surface ◽

Exponentially Stretching ◽

Made In

Purpose – The purpose of this paper is to analyze the Eyring Powell fluid over an exponentially stretching surface. Heat and mass transfer effects are taken into account with nanoparticles. Design/methodology/approach – Appropriate transformations are employed to reduce the boundary layer partial differential equations into ordinary differential equations. Series solutions of the problem are obtained and impacts of physical parameters on the velocities, temperature and concentration profiles are discussed. Findings – Numerical values of local Nusselt and Sherwood numbers for all the involved physical parameters are computed and analyzed. A comparative study between the present and previous results is made in a limiting sense. Local Nusselt number −′(0) increases by increasing ε, Pr, λ and N while it decreases for δ, N_{t{, N_{b} and Sc. Originality/value – This analysis has not been discussed in the literature yet.

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Experimental studies of a distorted turbulent spot in a three-dimensional flow

Journal of Fluid Mechanics ◽

10.1017/s0022112096008804 ◽

1996 ◽

Vol 329 ◽

pp. 1-24 ◽

Cited By ~ 3

Author(s):

M. Jahanmiri ◽

A. Prabhu ◽

R. Narasimha

Keyword(s):

Experimental Studies ◽

Three Dimensional ◽

Turbulent Spot ◽

Three Dimensional Flow ◽

Streamline Curvature ◽

Trailing Edges ◽

Series Of Experiments ◽

Tollmien Schlichting ◽

Wing Tips ◽

Made In

We report here on the results of a series of experiments carried out on a turbulent spot in a distorted duct to study the effects of a divergence with straight streamlines preceded by a short stretch of transverse streamline curvature, both in the absence of any pressure gradient. It is found that the distortion produces substantial asymmetry in the spot: the angles at which the spot cuts across the local streamlines are altered dramatically (in contradiction of a hypothesis commonly made in transition zone modelling), and the Tollmien–Schlichting waves that accompany the wing tips of the spot are much stronger on the outside of the bend than on the inside. However there is no strong effect on the internal structure of the spot and the eddies therein, or on such propagation characteristics as overall spread rate and the celerities of the leading and trailing edges. Both lateral streamline curvature and non-homogeneity of the laminar boundary layer into which the spot propagates are shown to be strong factors responsible for the observed asymmetry. It is concluded that these factors produce chiefly a geometric distortion of the coherent structure in the spot, but do not otherwise affect its dynamics in any significant way.

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