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Added mass

About: Added mass is a research topic. Over the lifetime, 2849 publications have been published within this topic receiving 47899 citations.


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Journal ArticleDOI
TL;DR: Durand et al. as discussed by the authors used numerical simulations to model gennakers, in order to predict both propulsive force and sail dynamic stability, using a finite element structural analysis program dedicated to sails and rig simulations coupled with an unsteady Reynolds averaged Navier-Stokes equations (URANSE) solver.

24 citations

Journal ArticleDOI
TL;DR: In this paper, a theoretical study of the transient sphere motion under the influence of gravity through an incompressible Newtonian fluid subject to an Oseen-type drag relationship has been carried out and exact closed form expressions for the instantaneous position, velocity and acceleration of the sphere are presented.
Abstract: A theoretical study of the transient sphere motion (under the influence of gravity) through an incompressible Newtonian fluid subject to an Oseen-type drag relationship has been carried out. Exact closed form expressions for the instantaneous position, velocity and acceleration of the sphere are presented. An analytical expression developed herein also enables the delineation of the “best” sphere-fluid combination for the experimental observations of transient effects and these provide useful guidelines for designing laboratory experiments. However, this study is restricted to dense spheres falling in light liquids when the additional effects arising from the added mass and the Basset forces are negligible. Also, the boundary effects are altogether neglected.

24 citations

Journal ArticleDOI
TL;DR: In this article, a scaled cylindrical model with a height of 300mm, an outer diameter of 60mm, and various heave plates was designed, manufactured, and tested.

24 citations

01 Oct 1988
TL;DR: In this paper, an analytic method is presented for estimating all the added mass terms of a deeply submerged, submarine-like rigid body, where each component is represented as an ellipsoid with three independently sized principal axes.
Abstract: : An analytic method is presented for estimating all the added mass terms of a deeply submerged, submarine-like rigid body. This body may consist of any number of components (hull, sail, fins, etc.). Each component is represented as an ellipsoid with three independently sized principal axes; this allows the added masses to be calculated analytically. Ellipsoid geometry, orientation, and relative location are chosen so that both added masses and added moments of inertia are optimally modelled. Interference effects between the main hull component and an appendage are approximately accounted for by using the flow field around a replacement ellipsoid for the hull to modify the flow at the appendage; interference effects between appendages are neglected. The analysis uses incompressible potential flow theory. It does not account for any circulation in the flow. Calculations carried out using this method are very fast. They show that both appendage thickness and hull interference can appreciably affect those added mass coefficients which contribute to coupling. Keywords: Submarines hydrodynamics, Potential flow, Added mass, Acceleration coefficients, Dynamic derivatives, Equations of motion, Canada. (EDC)

24 citations

Journal ArticleDOI
TL;DR: In this article, the hydrodynamics of a rigid, weakly permeable sphere undergoing translational oscillations in an incompressible Newtonian fluid were determined using homogenization and scaling arguments, showing that the flow inside the sphere may be modeled by Darcy's law and that the Beavers-Joseph-Saffman boundary condition still applies for oscillatory flows, provided the frequency of oscillation is not too high.
Abstract: We determine the hydrodynamics of a rigid, weakly permeable sphere undergoing translational oscillations in an incompressible Newtonian fluid. We check using homogenization and scaling arguments that the flow inside the sphere may be modeled by Darcy’s law and that the Beavers–Joseph–Saffman (BJS) boundary condition still applies for oscillatory flows, provided the frequency of oscillation is not too high. The BJS boundary condition introduces a slip velocity and to leading order in e=k/a, where k is the particle permeability and a is the radius, the particle may be regarded as impermeable with a slip length independent of frequency. Under these circumstances we solve for the flow field, pressure distribution and drag explicitly and show their behavior for 0⩽e⩽0.05 and frequencies relevant to electroacoustics (1–10 MHz). From the drag we find the leading order corrections due to particle permeability of the pseudo-steady drag, Basset force and added mass.

24 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202351
2022133
2021111
2020116
2019129
2018124