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Numerical simulation of the motion of neutrally buoyant particles in the plane Poiseuille flow of a Newtonian fluid

✍ Scribed by Tsorng-Whay Pan


Publisher
Elsevier Science
Year
2001
Tongue
French
Weight
251 KB
Volume
329
Category
Article
ISSN
1620-7742

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✦ Synopsis


In this note we discuss the generalization of a Lagrange multiplier based fictitious domain method to the simulation of migration of neutrally buoyant particles in plane Poiseuille flow of a Newtonian fluid. The migration away from the center of the channel is believed to be an effect of the curvature of the velocity profile. We found this effect is not weakened by the presence of many particles, but instead by the collisions among the particles. Experiments and simulations show that the particles concentrate in the central region where the shear rate is low.  2001 Académie des sciences/Éditions scientifiques et médicales Elsevier SAS granular media / soils / porons media

Simulation numérique du mouvement de particules solides dans un fluide visqueux Newtonien de même densité pour des conditions aux limites de type Poiseuille

Résumé.

Le but de cette note est de decrire une méthode de simulation numérique de l'écoulement de mélanges de particules solides et d'un fluide visqueux Newtoniens, fluide et particules étant de même densité. La méthode numérique est du type domaines fictifs avec multipliceteurs de Lagrange definis sur chaque particule. Les conditions aux limits sont du type Poiseuille. On observe en particulier que dans le cas de l'écoulement dans un canal les particules vont se concentrer au voisinaqe de l'axe du canal qui est une région à faible taux de cisaillement.  2001 Académie des sciences/Éditions scientifiques et médicales Elsevier SAS milieux granulaires / sols / milieux poreux


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