Simulation of flows with violent free surface motion and moving objects using unstructured grids

Löhner, Rainald; Yang, Chi; Oñate, Eugenio

doi:10.1002/fld.1244

Cited by 65 publications

(43 citation statements)

References 48 publications

(36 reference statements)

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“…The finite element method, FEM, is adopted in this work to solve the second set of equations (2). The FEM statement of the problem is as follows: Let * be the finite element space to interpolate functions, constructed in the usual manner.…”

Section: Fem Solvermentioning

confidence: 99%

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A FEM fluid–structure interaction algorithm for analysis of the seal dynamics of a Surface-Effect Ship

García¹,

Capua²,

Serván-Camas³

et al. 2015

Computer Methods in Applied Mechanics and Engineering

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This paper shows the recent work of the authors in the development of a time-domain FEM model for evaluation of the seal dynamics of a surface effect ship. The fluid solver developed for this purpose, uses a potential flow approach along with a stream-line integration of the free surface. The paper focuses on the free surface-structure algorithm that has been developed to allow the simulation of the complex and highly dynamic behavior of the seals in the interface between the air cushion, and the water. The developed fluid-structure interaction solver is based, on one side, on an implicit iteration algorithm, communicating pressure forces and displacements of the seals at memory level and, on the other side, on an innovative wetting and drying scheme able to predict the water action on the seals. The stability of the iterative scheme is improved by means of relaxation, and the convergence is accelerated using Aitken's method. Several validations against experimental results have been carried out to demonstrate the developed algorithm.

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Section: Fem Solvermentioning

confidence: 99%

“…For example, Oñate and García-Espinosa [1] presented a stabilized FEM for fluid structure interaction with free surface. In [2] Löhner et al developed a FEM capable of tracking violent free surface flows interacting with objects. Also García-Espinosa et al [3] developed a new technique to track complex free surface shapes.…”

Section: Introductionmentioning

confidence: 99%

A FEM fluid–structure interaction algorithm for analysis of the seal dynamics of a Surface-Effect Ship

García¹,

Capua²,

Serván-Camas³

et al. 2015

Computer Methods in Applied Mechanics and Engineering

Self Cite

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show abstract

“…The model has been reviewed by Scardovelli and Zaleski [9] and Hewitt and Reeks [10] who claim VOF as a useful tool for investigating interfacial regime in multiphase flows. Recently, Löhner et al [11] proved the robustness of VOF technique for predicting the free surface flow using unstructured grid. Moshammer et al [6] has successfully simulated the oil distribution around a single rotating gear by using VOF model.…”

Section: Volume Of Fluid (Vof) Multiphase Modelmentioning

confidence: 99%

Numerical Investigation on Fluid Flow of Gear Lubrication

Versteeg

Hargrave

et al. 2008

SAE Int. J. Fuels Lubr.

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Several details of the mechanism of gear lubrication are still in doubt in spite of many decades of study of this subject. The focus of our work is the investigation of the mechanism by which oil † temperature variations affect gear idle rattle, which requires an understanding of the distributions of lubricant and heat within a gearbox. This paper presents the findings of a study of lubricant flow in a simple model gearbox by means of CFD (Computational Fluid Dynamics) and its validation by a series of tests on a spur gear rig. The commercial CFD code Fluent is used to simulate the splash flow of lubricant, using the techniques of dynamic meshing and VOF (Volume of Fluid). Our model takes into account the effects on the distribution of gear lubricant of lubricant level and physical properties as well as rotational speed. The results demonstrate that the flow patterns are strongly influenced by all these variables. The predictions are validated by high-speed flow visualisations using high-resolution imaging in conjunction with a pulsed Cu-vapour laser light source and powerful white light source. The simulated fluid flows are in good qualitative agreement with the experimental visualisation. Estimates of the velocity of oil droplets from the images are compared with CFD predictions of the velocity in regions with high lubricant-phase-fraction resulting from lubricant splashing.

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“…The publications [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] and references therein describe different computational strategies for fluid-structure interaction and involve either one or more time integration schemes. It is noted that the information provided on the integration of time and the temporal matching of kinematic quantities at the interface is often missing or simply not given in an explicit way.…”

Section: Introductionmentioning

confidence: 99%

On the temporal stability and accuracy of coupled problems with reference to fluid–structure interaction

Joosten¹,

Dettmer²,

Perić³

2010

Numerical Methods in Fluids

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SUMMARYThis work investigates the effect of employing different time integration schemes in the sub-domains of a coupled problem, such as fluid-structure interaction. On the basis of a one-dimensional model problem and the two versions of the generalized-method developed for first-and second-order systems, it is shown that the overall problem is likely to be less stable and less accurate than the individual sub-problems unless special measures are taken. The benchmark problem of the oscillating flexible beam is used to demonstrate that these findings also apply to full computational fluid-structure interaction.

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Simulation of flows with violent free surface motion and moving objects using unstructured grids

Cited by 65 publications

References 48 publications

A FEM fluid–structure interaction algorithm for analysis of the seal dynamics of a Surface-Effect Ship

A FEM fluid–structure interaction algorithm for analysis of the seal dynamics of a Surface-Effect Ship

Numerical Investigation on Fluid Flow of Gear Lubrication

On the temporal stability and accuracy of coupled problems with reference to fluid–structure interaction

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