Orateur
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.
