12-13 December 2016
Institut Henri Poincaré
Europe/Paris timezone

Modelling atomization with phase change

12 Dec 2016, 17:00
30m
Amphi Hermite (Institut Henri Poincaré)

Amphi Hermite

Institut Henri Poincaré

11 Rue Pierre et Marie Curie, 75005 Paris, France

Speaker

Dr François-Xavier Demoulin (CORIA)

Description

DNS[1], LES [2] and RANS [3] modelling of atomization have been developed for the last decade in our laboratory with a particular attention devoted on the behavior of the interface. In particular model equations for the liquid-gas surface density have been proposed based on the pioneering work of Borghi and Vallet [4]. The purpose of this approach is to determine the surface density that we believe is the first order parameter to determine the mass transfer rate, a key future of fuel injection system. In addition to well-developed procedures usually used to evaluate the vaporization rate for dispersed spray based on the resolution of Boltzmann-Williams kinetic equation, our focus has been to determine the phase change rate for any kind of interface geometry not only spherical droplet. To do so the interface capturing DNS code Archer has been extended to handle heat and mass transfer at the interface based on the method proposed by Tanguy et al. [5], [6]. From this work the turbulent mixing of a scalar quantity issued from an interface such has the vapor concentration has been studied showing the importance of interface boundary layer zone on the global statistic of the scalar field [7]. Further works concern the extension of interface capturing method generally based on incompressible scheme to fully compressible code to handle other phenomena occurring during the injection process such as cavitation. [1] T. Menard, S. Tanguy, et A. Berlemont, « Coupling level set/VOF/ghost fluid methods: Validation and application to 3D simulation of the primary break-up of a liquid jet », Int. J. Multiph. Flow, vol. 33, n o 5, p. 510‐524, 2007. [2] J. Chesnel, J. Reveillon, T. Menard, et F. X. Demoulin, « Large eddy simulation of liquid jet atomization », At. Sprays, vol. 21, n o 9, p. 711‐736, 2011. [3] R. Lebas, T. Menard, P. A. Beau, A. Berlemont, et F. X. Demoulin, « Numerical simulation of primary break-up and atomization: DNS and modelling study », Int. J. Multiph. Flow, vol. 35, n o 3, p. 247‐260, 2009. [4] A. Vallet et R. Borghi, « Modélisation Eulerienne de L’atomisation d’un Jet Liquide », C R Acad Sci Paris Sér II B, vol. 327, p. 1015–1020, 1999. [5] S. Tanguy, T. Ménard, et A. Berlemont, « A Level Set Method for vaporizing two-phase flows », J. Comput. Phys., vol. 221, n o 2, p. 837‐853, 2007. [6] B. Duret, T. Menard, J. Reveillon, et F. X. Demoulin, « Two phase flows DNS of evaporating liquid-gas interface including interface regression, using Level Set and Coupled Level Set/VOF method », présenté à 8th International Conference on Multiphase Flow (ICMF 2013, 2013. [7] B. Duret, G. Luret, J. Reveillon, T. Menard, A. Berlemont, et F. X. Demoulin, « DNS analysis of turbulent mixing in two-phase flows », Int. J. Multiph. Flow, vol. 40, n o 0, p. 93‐105, 2012.

Presentation Materials