Approche Lagrangienne des écoulements diphasiques multidimensionnels

Société Bertin

Abstract

Mathematical modelling of two phase flows gained profits from progress made in computational fluid dynamics and from increased needs in availability of simulation tools for processes involving multiphasic mixing. Two approaches, called eulerian and lagrangian, have been proposed for two phase flow modelling.

Lagrangian approach is described with a focuse on physical models for mass, momentum, internal energy, turbulent kinetic energy exchanges. Coupling between dispersed phase and continuous phase is described as well.

In order to show that the two approaches, generally claimed to be in competition, are complementary, specifiC ranges of applications of each method are presented. Some results showing evaporation and two way coupling between dispersed phase and continuous phase turbulence are briefly described.

As a conclusion, possible evolutions of two phase ftow modelling are sketched. ln particular, some thoughts on the coupling between lagrangian and eulerian approaches are presented. Also, specific aspects related to parallelisation of an eulerian code using lagrangian approach for the dispersed phase are outlined.