1Numerical simulation of compressible two phase flows

Fabien

Description

1Numerical simulation of compressible two-phase flows F. Petitpas SMASH Team - MARSEILLE

• numerical simulation


• single velocity


• lagrangian eulerian


• multi-velocity flow


• front tracking


• evaporation front


• heavy numerical

Sujets

• Computer simulation

Informations

• Publié par: pefav
• Nombre de lectures: 23
• Langue: English
• Poids de l'ouvrage: 4 Mo

Extrait

     

F. Petitpas SMASH Team  MARSEILLE

Flows zoology – Position of the topic

Compressibles

Single phase

Single velocity

• Interface problems resolution

• Twophase mixtures in mechanical equilibrium 

Incompressibles

Multiphase

Multivelocity

• Non equilibrium twophase mixtures

• General models

• General models

2

Single velocity flows / Interface problems

Single contact interface

Media A

Media B

Μ

Evaporation front

Steam

Liquid

Detonation

Μ

3

Some words about discretisation scales

“Macro” scale : Multivelocity flow

u g

u l

An averaged model with two velocities is needed

« Micro » scale : Single velocity flow

A reduced model for interface problems is enough

4



On the choice of the method

Sharp interface methods  Lagrangian methods with moving meshes, ALE (Arbitrary Lagrangian Eulerian) Good for solid weak deformation

 Front tracking, VOF, Level Set

Very impressive results

Generally non conservative regarding mass and energy

Heavy numerical treatment

Not adapted for fluids computation with extreme deformations

5