Numerical simulations of drag modulation by microbubbles in a turbulent Taylor-Couette flow
dc.contributor.author
hal.structure.identifier | CHOUIPPE, Agathe
|
dc.contributor.author
hal.structure.identifier | CLIMENT, Eric
|
dc.contributor.author
hal.structure.identifier | LEGENDRE, Dominique
|
dc.contributor.author
hal.structure.identifier | GABILLET, Céline
|
dc.date.accessioned | 2014 |
dc.date.available | 2014 |
dc.date.issued | 2013 |
dc.date.submitted | 2014 |
dc.identifier.uri | http://hdl.handle.net/10985/8695 |
dc.description.abstract | The aim of our study is to investigate numerically the interaction between a dispersed phase composed of microbubbles and a turbulent Taylor-Couette flow (flow within the gap between two cylinders). We use the Euler-Lagrange approach based on Direct Numerical Simulation of the continuous phase flow equations and a Lagrangian tracking for the dispersed phase. Each bubble trajectory is calculated by integrating the force balance equation accounting for buoyancy, drag, added-mass, pressure gradient, and the lift forces. The numerical method has been adapted in order to take into account the feed-back effect of the dispersed bubbles on the carrying flow. Our approach is based on local volume average of the two-phase Navier-Stokes equations. Local and temporal variations of the bubble concentration and momentum source terms are accounted for in mass and momentum balance equations. A number of reference cases have been tested to validate the modelling approach and its numerical implementation. Then, our previous study of bubble dispersion has been extended to two-way coupling simulations of turbulent Taylor-Couette flows (only inner cylinder is rotating). Modulation of the drag will be discussed for different geometries, Reynolds numbers and bubble sizes. The results show that near-wall turbulent structures are modified by the presence of bubbles. |
dc.language.iso | en |
dc.rights | Post-print |
dc.title | Numerical simulations of drag modulation by microbubbles in a turbulent Taylor-Couette flow |
dc.typdoc | Communication avec acte |
dc.localisation | Centre de Paris |
dc.subject.hal | Physique: Dynamique des Fluides |
dc.subject.hal | Sciences de l'ingénieur: Mécanique: Mécanique des fluides |
ensam.audience | Internationale |
ensam.conference.title | 8th International Conference on Multiphase Flow (ICMF) |
ensam.conference.date | 2013-05 |
ensam.country | Korea, Democratic People's Republic Of |
ensam.title.proceeding | Proceedings of the 8th ICMF |
ensam.page | 11p |
hal.identifier | hal-01071647 |
hal.version | 1 |
hal.status | accept |