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Gerrits, J.; Veldman, Arthur

doi:10.1023/a:1022055916067

Cited by 44 publications

(3 citation statements)

References 7 publications

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“…Gerrits and Veldman developed, and named, the improved Volume-of-Fluid method (iVOF) for the study of sloshing liquid fuel in satellites [164].The iVOF method uses a structured, non-boundary fitted grid, allowing for the easy generation of the grid around complex structures. The authors argue that the iVOF method improves upon the original VOF method which suffers from the production of flotsam and jetsam, as well as gain or loss of water due to rounding the VOF function.…”

Section: Finite Volume Methods With Fsimentioning

confidence: 99%

Hydrodynamics of offshore structures with specific focus on wind energy applications

Benitz

Lackner

Schmidt

2015

Renewable and Sustainable Energy Reviews

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This review covers the broad scope of ocean hydrodynamics on offshore marine structures, laying the framework for studying offshore wind energy with a variety of engineering methods. First, water wave theory is described beginning with the fundamental equations of fluid mechanics. A variety of wave theories are discussed, beginning with linearized wave theory, and continuing with Stokes, cnoidal and solitary wave theory. The regions of wave applicability for different theories is shown, summarizing the discussion of water wave theory. Following the introduction of water wave theory, ocean physics are introduced. This section includes ocean wave generation, random waves, spectral representation and commonly used wave spectra, including the Pierson-Moskowitz and JONSWAP spectra. Next, wave-body interaction is presented, first looking at static and then dynamic loads. The dynamic load discussion covers waves, added mass and impulse loads. The section on wave-body interaction concludes with a review of recent literature on wave-body interactions, with emphasis on offshore wind energy. Additionally, a sample of existing engineering tools for modeling hydrodynamics on offshore wind turbines is presented. Finally, finite volume methods are presented to lay the groundwork for reviewing recent computational fluid dynamics research relating to the wave-body interaction problem. The review culminates in a review of recent CFD research.

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Section: Finite Volume Methods With Fsimentioning

confidence: 99%

Hydrodynamics of offshore structures with specific focus on wind energy applications

Benitz

Lackner

Schmidt

2015

Renewable and Sustainable Energy Reviews

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“…However, it was noted that boundary-layer phenomena become increasingly important as the fluid approaches resonance. Bao and Pascal [24] and Gerrits and Veldman [25] have developed additional models and stability analysis for sloshing in partially filled spacecraft tanks. It is important to note that a primary feature distinguishing rotating liquids research related to projectiles and spacecraft is that typical spacecraft spin rates are 1-2 orders of magnitude less than standard spin-stabilized artillery rounds, which can lead to significant differences to the range of Re encountered in the problem.…”

Section: Armentioning

confidence: 99%

Design Considerations for Stability of Liquid Payload Projectiles

Rogers

Costello

Cooper

2013

Journal of Spacecraft and Rockets

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It is well known that projectiles equipped with liquid payloads experience large destabilizing moments induced by internal motion of the fluid. For some configurations, these moments may lead to catastrophic flight instabilities. This paper explores how payload geometry, fluid spin-up rate, and the magnitude of launch perturbations affect the flight trajectories of projectiles with a liquid payload, including projectile instability. A dynamic simulation model is used in which a projectile rigid-body dynamics representation incorporates liquid moments generated from linearized Navier-Stokes predictions. A novel feature of this simulation is its use of linear filtering within the model, which determines fast-and slow-mode angle-of-attack contributions at each time step to be used in computation of liquid moments. Example cases and Monte Carlo simulations demonstrate how design factors and launch perturbations affect the projectile's tendency to exhibit flight instability. The paper concludes with a summary of advantageous design characteristics that are likely to mitigate the effects of destabilizing liquid moments.

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“…Slosh is a term that often refers to a seemingly chaotic flow of two fluids, usually a liquid and a gas, within a containment structure such as a tank. Common occurrences of slosh are within the fuel tanks of passenger vehicles [1], commercial aircraft [2][3][4], spacecraft [5,6] or in tanker vessels transporting liquefied natural gas [7,8]. The resulting slosh forces are an important consideration in the structural design of tanks as well as the dynamics and control of the vehicles carrying them [4,9].…”

Section: Introductionmentioning

confidence: 99%

Embedded One-Dimensional Orifice Elements for Slosh Load Calculations in Volume-Of-Fluid CFD

Botha

Malan

2022

Applied Sciences

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For CFD liquid sloshing simulations, fine computational mesh resolutions are typically required to model the flow within small flow passages or orifices found in fuel tanks. This work presents a method of replacing the fine computational mesh elements within orifices with large one-dimensional mesh elements that integrate seamlessly with standard finite volume computational elements with the intended advantage of reducing the overall computational cost of CFD simulations. These one-dimensional elements conserve mass and momentum for two-phase flow in incompressible Volume-Of-Fluid CFD. Instead of fully resolving the momentum diffusion term, empirical correlations are used to account for the viscous losses within the orifices for both two- and three-dimensional simulations. The one-dimensional orifice elements are developed and validated against analytical and experimental results using the finite volume CFD code Elemental®. Furthermore, these elements are tested in a violent sloshing simulation and compared with full-resolution numerical results as well as experimental results. The elements are shown to decrease computational cost significantly by reducing the number of computational elements as well as increasing the simulation time step sizes (due to an increase in element sizes).

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Cited by 44 publications

References 7 publications

Hydrodynamics of offshore structures with specific focus on wind energy applications

Hydrodynamics of offshore structures with specific focus on wind energy applications

Design Considerations for Stability of Liquid Payload Projectiles

Embedded One-Dimensional Orifice Elements for Slosh Load Calculations in Volume-Of-Fluid CFD

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