On the application of the single-phase level set method to naval hydrodynamic flows

Mascio, Andrea Di; Broglia, Riccardo; Muscari, Roberto

doi:10.1016/j.compfluid.2006.08.001

Cited by 96 publications

(51 citation statements)

References 38 publications

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“…In this study, the parameters are selected to coincide with Duncan's experiment, where a NACA0012 hydrofoil is towed in a tank [26][27][28] results (dash-dot-dot) [24], and theoretical results (dotted) [25]. Mascio et al [29]; symbol: Duncan [26].…”

Section: Free Surface Flow Around a Hydrofoilmentioning

confidence: 99%

Simulation of free surface flows using the flux‐difference splitting scheme on the hybrid Cartesian/immersed boundary method

Shin¹,

Bae²,

Kim³

et al. 2011

Numerical Methods in Fluids

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SUMMARYIn this study, a method is developed to simulate the interaction between free surface flows and moving or deforming boundaries using the flux-difference splitting scheme on the hybrid Cartesian/immersed boundary method. At each physical time step, the boundary is defined by an unstructured triangular surface grid. Immersed boundary (IB) nodes are distributed inside an instantaneous fluid domain based on edges crossing the boundary. At an IB node, dependent variables are reconstructed along the local normal line to the boundary. Inviscid fluxes are computed using Roe's flux-difference splitting scheme for immiscible and incompressible fluids. The free surface is considered as a contact discontinuity in the density field. The motion of free surface is captured without any additional treatment along the fluid interface. The developed code is validated by comparisons with other experimental and computational results for a piston-type wave maker, impulsive motion of a submerged circular cylinder, flow around a submerged hydrofoil, and Rayleigh-Taylor instability. The developed code is applied to simulate wave generation due to a continuously deforming bed beneath the free surface. The violent motion of a free surface caused by sloshing in a spherical tank is simulated. In this case, the free surface undergoes breakup and reconnection.

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Section: Free Surface Flow Around a Hydrofoilmentioning

confidence: 99%

Simulation of free surface flows using the flux‐difference splitting scheme on the hybrid Cartesian/immersed boundary method

Shin¹,

Bae²,

Kim³

et al. 2011

Numerical Methods in Fluids

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“…utilizing either a two equation closure based on Menter's [39] blended k −ε/k − (BKW) or the explicit algebraic Reynolds stress (ARS) [40] which is modeled with an additional term a ex i j k added to the right-hand side of Equation (3). DES [41] is also available and the details of the turbulence modeling can be found in Xing et al [31].…”

Section: Mathematical Modelmentioning

confidence: 99%

“…As ships have complex geometries, most computations are based on either structured [1] or unstructured [2] non-orthogonal grids. Additionally, overset grids are used to handle local geometry details and the motions present in seakeeping, maneuvering and dynamic stability studies [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of linear and nonlinear convection schemes on multidimensional non‐orthogonal grids with applications to KVLCC2 tanker

Ismail

Carrica

Xing

et al. 2009

Numerical Methods in Fluids

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SUMMARYAlmost all evaluations of convection schemes reported in the literature are conducted using simple problems on uniform orthogonal grids; thus, having limited contribution when solving industrial computational fluid dynamics (CFD), where the grids are usually non-orthogonal with distortions. Herein, several convection schemes are assessed in uniform and distorted non-orthogonal grids with emphasis on industrial applications. Linear and nonlinear (TVD) convection schemes are assessed on analytical benchmarks in both uniform and distorted grids. To evaluate the performance of the schemes, four error metrics are used: dissipation, phase and L 1 errors, and the schemes' effective order of accuracy. Qualitative and quantitative deterioration of these error metrics as a function of the grid distortion metrics are investigated, and rigorous verifications are performed. Recommendations for effective use of the convection schemes based on the range of grid aspect ratio (AR), expansion ratio (ER) and skewness (Q) are included. A ship hydrodynamics case is studied, involving a Reynolds averaged Navier-Stokes simulation of a bare-hull KVLCC2 tanker using linear and nonlinear convection schemes coupled with isotropic and anisotropic Reynolds-stress (ARS) turbulence models using CFDShip-Iowa v4. Predictions of local velocities and turbulent quantities from the midships to the nominal wake plane are compared with experimental fluid dynamics (EFD), and rigorous verification and validation analyses for integral forces and moments are performed for 0 • and 12 • drift angles. Best predictions are observed when coupling a second-order TVD scheme with the anisotropic turbulence model. Further improvements are observed in terms of prediction of the vortical structures for 30 • drift when using TVD2S-ARS coupled with DES.

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“…A relatively small rise in the water level (∼ 0.1 m) before the ship reaches the measurement section is followed soon after the transit by a significant depression (∼ 1.6 m) that develops within the channel and propagates in the mudflat. The depression wake lasted for about 80 s. The simulation of the pressure and velocity fields around the hull of the ship was carried out using the uRaNSeXnavis simulator (Broglia et al, 2014;Di Mascio et al, 2007). It is a finite volume solver based on the discretization of free surface, incompressible, viscous, highReynolds-number fluid equations (unsteady Reynolds averaged Navier-Stokes equations).…”

Section: Hydrodynamic Characterizationmentioning

confidence: 99%

Hydrogeological effects of dredging navigable canals through lagoon shallows. A case study in Venice

Teatini

Isotton²,

Nardean

et al. 2017

Hydrol. Earth Syst. Sci.

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Abstract. For the first time a comprehensive investigation has been carried out to quantify the possible effects of dredging a navigable canal on the hydrogeological system underlying a coastal lagoon. The study is focused on the Venice Lagoon, Italy, where the port authority is planning to open a new 10 m deep and 3 km long canal to connect the city passenger terminal to the central lagoon inlet, thus avoiding the passage of large cruise ships through the historic center of Venice. A modeling study has been developed to evaluate the short (minutes), medium (months), and long (decades) term processes of water and pollutant exchange between the shallow aquifer system and the lagoon, possibly enhanced by the canal excavation, and ship wakes. An in-depth characterization of the lagoon subsurface along the channel has supported the numerical modeling. Piezometer and sea level records, geophysical acquisitions, laboratory analyses of groundwater and sediment samples (chemical analyses and ecotoxicity testing), and the outcome of 3-D hydrodynamic and computational fluid dynamic (CFD) models have been used to set up and calibrate the subsurface multi-model approach. The numerical outcomes allow us to quantify the groundwater volume and estimate the mass of anthropogenic contaminants (As, Cd, Cu, Cr, Hg, Pb, Se) likely leaked from the nearby industrial area over the past decades, and released into the lagoon from the canal bed by the action of depression waves generated by ships. Moreover, the model outcomes help to understand the effect of the hydrogeological layering on the propagation of the tidal fluctuation and salt concentration into the shallow brackish aquifers underlying the lagoon bottom.

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On the application of the single-phase level set method to naval hydrodynamic flows

Cited by 96 publications

References 38 publications

Simulation of free surface flows using the flux‐difference splitting scheme on the hybrid Cartesian/immersed boundary method

Simulation of free surface flows using the flux‐difference splitting scheme on the hybrid Cartesian/immersed boundary method

Evaluation of linear and nonlinear convection schemes on multidimensional non‐orthogonal grids with applications to KVLCC2 tanker

Hydrogeological effects of dredging navigable canals through lagoon shallows. A case study in Venice

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