Fiches de cours 2017-2018

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2nd Workshop on Advances in Theoretical and Computational Modelling of Interface Dynamics in Capillary Two-Phase Flows

ME-627

Lecturer(s) :

Gallaire François
Magnini Mirco
Thome John Richard
Various lecturers

Language:

English

Frequency

Every year

Remarque

Next time: October 9th to October 13th, 2017

Summary

This workshop instructs researchers on the latest advances in the computational modelling of the interfacial dynamics of capillary two-phase flow phenomena using the CFD-based frameworks of VOF, LS, ALE-FEM, and Molecular Dynamics methods. Lectures are complemented with practical hands-on sessions.

Content

The workshop is composed of the following main parts:

• Mathematical basis of two-phase flow, Computational Fluid Dynamics and Molecular Dynamics approximations, surface tension, and phase change;

• Eulerian techniques with diffused interface methods to advect the interface, Volume Of Fluid (VOF) and Level Set (LS) methods, implicit advection of a color function, geometrical reconstruction and interface compression of the interface, interface topology calculation, surface tension and phase change modelling on a VOF and LS framework;

• Eulerian techniques for two-phase flows advecting marker points to preserve interface sharpness, numerical methods to advect marker points, mass conservation, front remeshing;

• Arbitrary Lagrangian-Eulerian (ALE) finite-element methods (FEM) for two-phase flows, finite element formulation, use of python language to build simplified models, update of the mesh morphology, moving boundaries;

• Molecular Dynamics (MD) simulations of liquid-vapor interfaces and phase change, structure and stability of liquid-vapor interfacial regions, interface thermophysics for polar and non-polar fluids, thin-film stability and rupture at the molecular level;

• Use of an opensource CFD package (OpenFOAM) with VOF and LS to simulate two-phase flows.

• Use of an in-house ALE-FEM code (Prof. Anjos) to simulate two-phase flows with an interface-fitting computational mesh.

• Use of an in-house MD code (Prof. Carey) to simulate the interface dynamics and phase change at the molecular level.

Note

External lecturers include: Prof. M. Trujillo (Univ. of Wisconsin-Madison, USA), Profs. A. Tomiyama and K. Hayashi (Kobe Univ., Japan), Prof. G. Anjos (State Univ. Rio de Janeiro, Brazil)

Keywords

Computational Fluid Dynamics, Hydrodynamic Instability, Surface tension, Two-phase flow

Learning Prerequisites

Required courses

Numerical Flow Simulation
Numerical Methods in Heat Transfer
Discretization Methods in Fluids

Resources

Bibliography

Encyclopedia of Two-Phase Heat Transfer and Flow (J.R. Thome)
Direct Numerical Simulations of Gas-Liquid Multiphase Flows (R. Scardovelli, S. Zaleski, G. Tryggvason)

Ressources en bibliothèque

• Encyclopedia of Two-Phase Heat Transfer and Flow / Thome
• Direct Numerical Simulations of Gas-Liquid Multiphase Flows / Scardovelli

Websites

• http://ltcm.epfl.ch/
• http://ltcm.epfl.ch/cms/page-127462.html