Orateur
Dr
Sébastien Tanguy
(Institut de Mécanique des Fluides de Toulouse)
Description
Studies on two-phase flows are of interest in many fundamental problems and industrial
applications, as the spray formation in internal combustion engine, the bubble formation in heat
exchangers, the fluid management in satellites or space launcher tanks, the spray cooling or the
interaction of bubbles with acoustic waves. The Direct Numerical Simulation is a powerful tool,
which is complementary to experimental measurements, to provide accurate results in complex
situations. However, unlike single-phase flows, currently the direct numerical simulation of two-
phase flows cannot be considered as a fully mature field, especially in most configurations
involving strong coupling between the interface motion with heat and mass transfer, acoustic or
shock waves, and/or a solid boundary where a contact line can be formed. This presentation will
emphasize on the development of new numerical methods [1,2,3,4,5] to perform accurate Direct
Numerical Simulations of two-phase flows with phase change in the framework of sharp
interface capturing numerical methods. The presentation will focus mainly on two specific
configurations involving liquid vapor phase change, i.e. Leidenfrost droplets and nucleate boiling.
We will discuss about suited numerical strategy to succeed numerical simulations in these
configurations. Accurate comparison between experiments and fully-resolved numerical
simulations will be presented in order to bring out the relevance of the proposed algorithms.
[1] S. Tanguy, T. Menard, A. Berlemont, A level set method for vaporizing two-phase flows, J.
Comput. Phys. 221 (2007) 837-853
[2] S. Tanguy, M. Sagan, B. Lalanne, F. Couderc, C. Colin, Benchmarks and numerical methods
for the simulation of boiling flows. J. Comput. Phys. 264 (2014) 1-22.
[3] L. Rueda Villegas, R. Alis, M. Lepilliez, S. Tanguy. A Level Set/Ghost Fluid Method for
boiling flows and liquid evaporation: Application to the Leidenfrost effect. J. Comp. Phys. 316
(2016) 789-813
[4] L. Rueda Villegas, S. Tanguy, G. Castanet, O. Caballina, F. Lemoine. Direct Numerical Simulation of the impact of a droplet onto a hot surface above the Leidenfrost temperature. Int. J. Heat Mass Transfer 104 (2017) 1090-1109
[5] G. Huber, M. Sagan, C. Colin, S. Tanguy. Direct Numerical Simulation of nucleate boiling at
moderate Jakob number and high microscopic contact angle. In preparation to be submitted in Int. J. Heat Mass Transfer
