Development of a VoF-fractional step solver for floating body motion simulation

Panahi, Roozbeh; Jahanbakhsh, Ebrahim; Seif, Mohammad Saeed

doi:10.1016/j.apor.2006.08.004

Cited by 34 publications

(33 citation statements)

References 25 publications

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“…Although many simulations have been done to investigate the accuracy of this software and all of the results were in good agreement with experimental data [4,15], but still in present study, the accuracy of the code is validated by simulating a trimaran vessel and comparing the numerical result with experimental result. and experimental data for case C Fig.…”

Section: Trimaran Resistancementioning

confidence: 48%

“…It must be remembered that, such a problem combines the complexity of free surface flow with rigid body motions. NUMEL 1 code [4], [15] which is used for present study provides an effective numerical tool for hydrodynamic simulation. Trimaran maneuvering simulation is a complex hydrodynamic problem that should be divided into minor sub-problems.…”

Section: Introductionmentioning

confidence: 99%

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Hydrodynamic Analysis of Trimaran Vessels

Javanmardi

Jahanbakhsh

Seif

et al. 2008

Polish Maritime Research

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Section: Trimaran Resistancementioning

confidence: 48%

Section: Introductionmentioning

confidence: 99%

Hydrodynamic Analysis of Trimaran Vessels

Javanmardi

Jahanbakhsh

Seif

et al. 2008

Polish Maritime Research

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“…In addition, convection term is linearized using Picard iteration method instead of the Newton's method in [23]. This is expressed as a flowchart in [16].…”

Section: Velocity and Pressure Couplingmentioning

confidence: 99%

“…The following equation is solved to determine the volume fraction α impling the availability of two phases in each CV. A moving mesh is implemented in this study, so the equation is based on Arbitrary Lagrangian-Eulerian (ALE) approach [16]:…”

Section: Governing Equationsmentioning

confidence: 99%

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Simulation of Water-Entry and Water-Exit Problems Using a Moving Mesh Algorithm

Panahi¹

2012

Journal of Theoretical and Applied Mechanics

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Abstract. Simulation of the water-entry and water-exit particularly, at the interface of two phases i.e. water and air due to the effect of flow-induced loads, gravity force and trapped air cushion presence is very complicated. This paper attempts to introduce a finite volume-based moving mesh algorithm in order to simulate such problems in a viscous incompressible two-phase medium. The algorithm employs a fractional step method to deal with the coupling between pressure and velocity fields. Interface is also captured by solving a volume fraction transport equation. A boundary-fitted body-attached mesh of quadrilateral Control Volumes (CVs) is implemented to record hydrodynamic time histories of loads, motions and interfacial flow changes around the structure. Forced water-exit of a cylinder is simulated based on the introduced algorithm, together with free symmetric and asymmetric water-entry of wedges. Results show that the presented algorithm is favorably capable of assessing such complexities when comparing to experimental data.

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Numerical investigation of gas–liquid and liquid–liquidTaylor flow through a circular microchannel with a sudden expansion

2021

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This paper investigates a CFD‐based analysis for gas–liquid and liquid–liquid Taylor flows through a circular axisymmetric microchannel with a sudden enlargement. A series of simulations are conducted by exploring the influence of different superficial velocity ratios, apparent viscosities, and channel expansion on the hydrodynamics of slug flow. A concentric junction introduces dispersed airflow into a continuous flow of water for gas–liquid flow, and the junction introduces dispersed water into a continuous flow of dodecane for liquid–liquid flow. The air‐bubble and water‐slug evolution processes, slug breakup, and slug expansion are investigated. In all cases, the lengths of air bubbles and water slugs increase with increasing superficial velocity ratio, particularly before the expansion. For gas–liquid flow, the apparent viscosity ratio causes a fluctuating interface over the uniform film region. However, the water slug length is shorter and the film region is slightly thicker in liquid–liquid compared to gas–liquid flow. The numerical analysis developed in this paper is in good agreement with the existing correlations and experimental data in the literature.

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Development of a VoF-fractional step solver for floating body motion simulation

Cited by 34 publications

References 25 publications

Hydrodynamic Analysis of Trimaran Vessels

Hydrodynamic Analysis of Trimaran Vessels

Simulation of Water-Entry and Water-Exit Problems Using a Moving Mesh Algorithm

Numerical investigation of gas–liquid and liquid–liquidTaylor flow through a circular microchannel with a sudden expansion

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