Abstract
The structure of an upward wall-bounded bubbly flow is investigated in the simple case of a turbulent boundary layer developing on a vertical flat plate. The data reported is part of a research program currently under progress. They concern the void fraction distribution, the wall shear stress, and the mean liquid velocity profiles. It is shown that depending on their mean diameter, a significant fraction of the bubbles deflected towards the wall. This migration, together with a significant deceleration of the bubbles at the surface, prove to be the two main mechanisms responsible for the so-called void peaking phenomenon. Besides, the skin friction coefficient which depends both on the amplitude of the peak, and on the free-stream velocity is found to increase in the presence of the dispersed phase. This increase is linked to a modification of the universal logarithmic law of the wall, and to a depression of the wake.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
