Wall model and mesh influence study for partial cavities

Goncalves, Éric; Decaix, Jean

doi:10.1016/j.euromechflu.2011.08.002

Cited by 21 publications

(22 citation statements)

References 39 publications

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“…For unsteady flows, the existence of a wall law is assumed to be valid at each instant. These assumptions have been studied in [34] and comparisons were proposed with a thin boundary layer approach.…”

Section: Wall Functionsmentioning

confidence: 99%

A comparative study of cavitation models in a Venturi flow

Charrière

Decaix

Goncalves

2015

European Journal of Mechanics - B/Fluids

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International audienceThis paper presents a numerical study of an aperiodic cavitation pocket developing in a Venturi flow. The mass transfer between phases is driven by a void ratio transport equation model. A new free-parameter closure relation is proposed and compared with other formulations. The re-entrant jet development, void ratio profiles and pressure fluctuations are analysed to discern results accuracy. Comparisons with available experimental data are done and good agreement is achieved

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Section: Wall Functionsmentioning

confidence: 99%

A comparative study of cavitation models in a Venturi flow

Charrière

Decaix

Goncalves

2015

European Journal of Mechanics - B/Fluids

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“…For unsteady flows, the existence of a wall law is assumed to be valid at each instant. These assumptions have been studied in [29] and comparisons were proposed with a thin boundary layer approach.…”

Section: Wall Functionsmentioning

confidence: 99%

“…In consequence the grid convergence in such cavitating flows raised lots of problems. In a previous work [29], we have investigated the mesh influence for the Venturi geometry in the near-wall area when a cavitation pocket develops and interacts with the turbulent boundary layer. We have considered five different meshes, with a final choice consisting of a H-type grid, which contains 251 nodes in the flow direction and 62 nodes in the orthogonal direction.…”

Section: Mesh and Numerical Parametersmentioning

confidence: 99%

About the uncertainty quantification of turbulence and cavitation models in cavitating flows simulations

Congedo

Goncalves

2015

European Journal of Mechanics - B/Fluids

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International audiencePrediction in numerical simulation of turbulent cavitating flows is strongly influenced by the presence of several empirical coefficients.The aim of the present paper is to explore the interaction between the cavitation model and turbulence in terms of uncertainty propagation through an unsteady numerical solver, for assessing the robustness and the accuracy of the physical models at different times. Furthermore, the influence of experimental data in the setting of some turbulence and cavitation model coefficients is investigated by means of a Bayesian approach. Finally, the interest is to provide some innovative insights for improving the understanding of these models for cavitating flows

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“…This assumption have been studied in (Goncalves and Decaix, 2012) and comparisons were proposed with a thin boundary layer approach.…”

Section: Wall Modellingmentioning

confidence: 99%