Generation of Water Waves Using Momentum Source Wave-Maker Applied to a RANS Solver

Feng, Xi‐Qiao; Wei, Wu

doi:10.1155/2019/1308960

Cited by 3 publications

(4 citation statements)

References 20 publications

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“…Due to the differences between the various solvers, the implementation of these wavemaker toolboxes would require significant adaptions to be compatible with the poten-tialFreeSurfaceFoam and shallowWaterFoam solvers. An easy alternative is the impulse source wavemaker, which requires only minor changes to the flow solver and is, thus, easily implemented (Schmitt et al 2019;Feng and Wu 2019;Schmitt 2017).…”

Section: Wavemakersmentioning

confidence: 99%

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Beyond VoF: alternative OpenFOAM solvers for numerical wave tanks

Schmitt

Windt

Davidson

et al. 2020

J. Ocean Eng. Mar. Energy

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The vast majority of numerical wave tank applications are solved using finite volume-based, volume of fluid methods. One popular numerical modelling framework is OpenFOAM and its two phase solvers, interFoam and interIsoFoam, enabling the simulation of a broad range of marine hydrodynamic phenomena. However, in many applications, certain aspects of the entire set of possible hydrodynamic phenomena are not of interest and the reduced complexity could allow the use of simpler, more computationally efficient solvers. One barrier for the application of such alternative solvers is the lack of suitable wavemaking and absorption capabilities, which this paper aims to address. A wavemaking and absorption methodology is presented, which can be applied to different solvers using the same fundamental concept. The implementation is presented for interFoam and interIsoFoam, as well as two other solvers whose use as numerical wave tanks has not previously been reported in the literature, shallowWaterFoam and potentialFreeSurfaceFoam. Parameter studies are performed to guide the user in the use of the methods. Example applications for two industrially relevant test cases are demonstrated; a multi-frequency wave packet focused at one position over flat bottom and regular waves propagating over a submerged shoal. All solvers yielded useful results, but some complex wave transformations in the shoal case were only resolved by the VoF methods. Alternative methods beyond the already well established VoF methods seem worth considering because potential for significant reductions in computational effort exist.

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Section: Wavemakersmentioning

confidence: 99%

“…An easy alternative is the impulse source wavemaker, which requires only minor changes to the flow solver and is, thus, easily implemented (Schmitt et al. 2019 ; Feng and Wu 2019 ; Schmitt 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Beyond VoF: alternative OpenFOAM solvers for numerical wave tanks

Schmitt

Windt

Davidson

et al. 2020

J. Ocean Eng. Mar. Energy

View full text Add to dashboard Cite

show abstract

“…In the last decade, the use of CFD code has become increasingly popular in the scientific community, see for instance the applications of industrial or research codes like OpenFOAM R (Jacobsen et al, 2011;Hu et al, 2016;Higuera et al, 2013;Windt et al, 2019), STAR-CCM+ (Oggiano et al, 2017;Jiao and Huang, 2020), ANSYS-FLUENT (Kim et al, 2016;Feng and Wu, 2019), and REEF3D (Bihs et al, 2016), just to mention few of them.…”

Section: Introduction and Scope Of The Studymentioning

confidence: 99%

Development and validation of a numerical wave tank based on the Harmonic Polynomial Cell and Immersed Boundary methods to model nonlinear wave-structure interaction

Robaux

Benoît

2021

Journal of Computational Physics

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A fully nonlinear potential Numerical Wave Tank (NWT) is developed in two dimensions, using a combination of the Harmonic Polynomial Cell (HPC) method for solving the Laplace problem on the wave potential and the Immersed Boundary Method (IBM) for capturing the free surface motion. This NWT can consider fixed, submerged or wall-sided surface piercing, bodies. To compute the flow around the body and associated pressure field, a novel multi overlapping grid method is implemented. Each grid having its own free surface, a two-way communication is ensured between the problem in the body vicinity and the larger scale wave propagation problem. Pressure field and nonlinear loads on the structure are computed by solving a boundary value problem on the time derivative of the potential. The stability and convergence properties of the solver are studied basing on extensive tests with standing waves of large to extreme wave steepness, up to H/λ = 0.2 (H is the crest-to-trough wave height and λ the wavelength). Ranges of optimal time and spatial discretizations are determined and high-order convergence properties are verified, first without using any filter. For cases with either high level of nonlinearity or long simulation duration, the use of mild Savitzky-Golay filters is shown to extend the range of applicability of the model. Then, the NWT is tested against two wave flume experiments, analyzing forces on bodies in various wave conditions. First, nonlinear components of the vertical force acting on a small horizontal circular cylinder with low submergence below the mean water level are shown to be accurately simulated up to the third order in wave steepness. The second case is a dedicated experiment with a floating barge of rectangular cross-section. This very challenging case (body with sharp corners in large waves) allows to examine the behavior of the model in situations at and beyond the limits of its formal application domain. Though effects associated with viscosity and flow separation manifest experimentally, the NWT proves able to capture the main features of the wave-structure interaction and associated loads.

show abstract

Section: Introduction and Scope Of The Studymentioning

confidence: 99%

Development and validation of a numerical wave tank based on the Harmonic Polynomial Cell and Immersed Boundary methods to model nonlinear wave-structure interaction

Robaux,

Benoit

2020

Preprint

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A Numerical Wave Tank (NWT) is developed within the fully nonlinear potential flow theory in two dimensions. It uses a combination of the Harmonic Polynomial Cell (HPC) method for solving the Laplace problem on the wave potential and the Immersed Boundary Method (IBM) for capturing the free surface motion. This NWT can consider either submerged or surface-piercing bodies or arbitrary shape. To compute the flow around the body and associated pressure field, a multi overlapping grid method is implemented. Each grid having its own free surface, a twoway communication is ensured between the problem in the body vicinity and the larger scale wave propagation problem. Nonlinear loads on the structure are computed from an accurate pressure field obtained thanks to a boundary value problem formulated on the time derivative of the potential, at the cost of a second matrix inversion at each time step.The mathematical formalism and the numerical methods of the NWT are first presented. Then a focus is made on both the stability and convergence properties of the solver. Then, the NWT is tested against both numerical and experimental results, analyzing forces acting on different bodies in various wave conditions. Each selected test-case exhibits a particular difficulty, from large steepness waves to very small water gap, and even sharp corners of the body. Nonlinear effects of various magnitude are considered and compared. A dedicated experimental campaign is also performed in a wave flume with a floating barge of rectangular cross-section in order to test the model against a practical engineering case under many different regular wave conditions.

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Generation of Water Waves Using Momentum Source Wave-Maker Applied to a RANS Solver

Cited by 3 publications

References 20 publications

Beyond VoF: alternative OpenFOAM solvers for numerical wave tanks

Beyond VoF: alternative OpenFOAM solvers for numerical wave tanks

Development and validation of a numerical wave tank based on the Harmonic Polynomial Cell and Immersed Boundary methods to model nonlinear wave-structure interaction

Development and validation of a numerical wave tank based on the Harmonic Polynomial Cell and Immersed Boundary methods to model nonlinear wave-structure interaction

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