Publication:
Effect of insoluble surfactant on turbulent bubbly flows in vertical channels

Placeholder

School / College / Institute

Program

KU Authors

Co-Authors

Lu, Jiacai
Tryggvason, Gretar

Publication Date

Language

Embargo Status

Journal Title

Journal ISSN

Volume Title

Alternative Title

Abstract

The effect of an insoluble surfactant on the structure of turbulent bubbly upflow in a vertical channel is examined by direct numerical simulations (DNS). For nearly spherical bubbles the presence of a surfactant reduces the lateral lift on the bubbles and changes the structure of the flow in major ways. Clean bubbles are driven to the walls by the lift force and the void fraction distribution has a well defined peak near the walls, resulting in significant reduction in flow rate. Bubbles with strong enough surfactants do not experience significant lateral lift and remain in the bulk flow. Indeed, when surfactant is present the addition of bubbles to a turbulent flow has relatively little effect on the flow, once the pressure gradient is adjusted to account for the reduced weight of the mixture.

Source

Publisher

Elsevier

Subject

Mechanics

Citation

Has Part

Source

International Journal of Multiphase Flow

Book Series Title

Edition

DOI

10.1016/j.ijmultiphaseflow.2017.05.003

item.page.datauri

Link

Rights

Copyrights Note

Endorsement

Review

Supplemented By

Referenced By

0

Views

0

Downloads

View PlumX Details