OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

Drop breakup modelling in turbulent flows.

Lalanne, Benjamin and Tanguy, Sébastien and Vejražka, Jiří and Masbernat, Olivier and Risso, Frédéric Drop breakup modelling in turbulent flows. (2014) In: 10th International Conference on Computational Fluid Dynamics in the Oil & Gas, Metallurgical and Process Industries - CFD 2014, 17 June 2014 - 19 June 2014 (Trondheim, Norway).

(Document in English)

PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader


This paper deals with drop and bubble break-up modelling in turbulent flows. We consider the case where the drop/bubble slip velocity is smaller than or of the order of the turbulent velocity scales, or when the drop/bubble deformation is mainly caused by the turbulent stress (atomisation is not addressed here). The deformation of a drop is caused by continuous interactions with turbulent vortices; the drop responds to these interactions by performing shape-oscillations and breaks up when its deformation reaches a critical value. Following these observations, we use a model of forced oscillator that describes the drop deformation dynamics in the flow to predict its break-up probability. Such a model requires a characterization of the shape- oscillation dynamics of the drop. As this dynamics is theoretically known only under restrictive conditions (without gravity, surfactants), CFD two-phase flow simulations, based on the Level-Set and Ghost Fluid methods, are used to determine the interface dynamics in more complex situations: deformation of a drop in the presence of gravity, bubble-vortex interactions. Results are compared with experimental data. The perspectives to apply this model to breakup in emulsification processes are also discussed.

Item Type:Conference or Workshop Item (Paper)
Additional Information:Thanks to CFD editor. The definitive version is available at http://www.sintef.no The original PDF of the article can be found at CFD website : http://www.sintef.no/globalassets/project/cdf2014/docs/official_proceedings_cfd2014-redusert-filstr.pdf
HAL Id:hal-03665179
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:Other partners > Academy of Sciences (CZECH REPUBLIC)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:26 Jun 2015 15:58

Repository Staff Only: item control page