Numerical sloshing simulations: Comparison between lagrangian and lumped mass models applied to two compartments with mass transfer

Fonfach, José Miguel Ahumada; Manderbacka, Teemu; Neves, Marcelo A. S.

doi:10.1016/j.oceaneng.2016.01.023

Cited by 20 publications

(12 citation statements)

References 40 publications

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“…Depending on the excitation features and the filling depth ratio h * 0 /L * , with h * 0 the water depth and L * the tank length, several scenarios may occur. As described in Faltinsen and Timokha (2009), nonlinear standing waves characterize the internal wave evolution at high filling ratios, i.e. h * 0 /L * > 0.25.…”

Section: Introductionmentioning

confidence: 94%

“…Bouscasse et al 2013), inducing rotational flow and viscous diffusion. The occurrence of the bore has been explained in Faltinsen and Timokha (2009) as a shock wave phenomenon, consequence of a commensurate spectrum characterizing the shallow water resonance in a tank. This means that all the sloshing natural frequencies are multiples of the lowest natural frequency and are nonlinearly excited by the harmonic excitation of the lowest mode (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…This means that all the sloshing natural frequencies are multiples of the lowest natural frequency and are nonlinearly excited by the harmonic excitation of the lowest mode (i.e. secondary resonance, Faltinsen and Timokha 2009). The interaction of the breaking wave with lateral walls causes large local loads (see, for example, Lugni et al 2006Lugni et al , 2010b, and hydroelastic effects when the typical temporal duration of the local load is comparable with a natural period of the structural mode contributing to large local stressing (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…The above observations strongly influence the choice of the suitable mathematical model to be used on each regime. Although at high and intermediate filling depth, the nonlinear multimodal theory by Faltinsen and Timokha (2009) is a reliable and extremely efficient tool for the description of the sloshing flows, it becomes less accurate for the shallow water case and even not converging for really shallow depth conditions. In any case, it fails when wave breaks.…”

Section: Introductionmentioning

confidence: 99%

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Global force and moment in rectangular tanks through a modal method for wave sloshing

Antuono

Lugni

2018

Journal of Fluids and Structures

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Basing on a modal description of the sloshing phenomenon, formulas for the global force and moment acting on two-dimensional rectangular tanks are proposed. These are extensively validated through comparison with experimental data for roll motions at different angles of excitement. Moreover, to extend the applicability of the modal method to the most violent breaking cases, a diffusive variant of the scheme is proposed. This relies on the use of a proper diffusive term in the continuity equation and allows for the overcoming of some numerical issues related to the sloshing dynamics in very shallow waters. Finally, a qualitative description of the interaction between diffusion, dispersion and nonlinearities has been proposed for the present modal scheme, along with a physical interpretation of the diffusive term.

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Global force and moment in rectangular tanks through a modal method for wave sloshing

Antuono

Lugni

2018

Journal of Fluids and Structures

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“…In the spirit of the isoparametric concept, IGA utilizes the NURBS basis functions in order to represent both the geometry and the unknown solution. For the geometry, the already presented definition (20) is employed. The unknown function u is then approximated in exactly the same fashion as:…”

Section: The Isoparametric Conceptmentioning

confidence: 99%

Boundary-conforming free-surface flow computations: Interface tracking for linear, higher-order and isogeometric finite elements

Zwicke

Eusterholz

Elgeti

2017

Computer Methods in Applied Mechanics and Engineering

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The simulation of certain flow problems requires a means for modeling a free fluid surface; examples being viscoelastic die swell or fluid sloshing in tanks. In a finite-element context, this type of problem can, among many other options, be dealt with using an interface-tracking approach with the DeformingSpatial-Domain/Stabilized-Space-Time (DSD/SST) formulation. A difficult issue that is connected with this type of approach is the determination of a suitable coupling mechanism between the fluid velocity at the boundary and the displacement of the boundary mesh nodes. In order to avoid large mesh distortions, one goal is to keep the nodal movements as small as possible; but of course still compliant with the nopenetration boundary condition. Standard displacement techniques are full velocity, velocity in a specific coordinate direction, and velocity in normal direction. In this work, we investigate how the interfacetracking approach can be combined with isogeometric analysis for the spatial discretization. If NURBS basis functions of sufficient order are used for both the geometry and the solution, both a continuous normal vector as well as the velocity are available on the entire boundary. This circumstance allows the weak imposition of the no-penetration boundary condition. We compare this option with an alternative that relies on strong imposition at discrete points. Furthermore, we examine several coupling methods between the fluid equations, boundary conditions, and equations for the adjustment of interior control point positions.

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A numerical investigation on the effect of symmetric and asymmetric flooding on the damage stability of a ship

Zhang

Lin

et al. 2020

J Mar Sci Technol

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Numerical sloshing simulations: Comparison between lagrangian and lumped mass models applied to two compartments with mass transfer

Cited by 20 publications

References 40 publications

Global force and moment in rectangular tanks through a modal method for wave sloshing

Global force and moment in rectangular tanks through a modal method for wave sloshing

Boundary-conforming free-surface flow computations: Interface tracking for linear, higher-order and isogeometric finite elements

A numerical investigation on the effect of symmetric and asymmetric flooding on the damage stability of a ship

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