Ultrasound-enhanced mass transfer during single-bubble diffusive growth

Álvaro Moreno Soto, Pablo Peñas, Guillaume Lajoinie, Detlef Lohse, and Devaraj van der Meer
Phys. Rev. Fluids 5, 063605 – Published 11 June 2020
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Abstract

Ultrasound is known to enhance surface bubble growth and removal in catalytic and microfluidic applications, yet the contributions of rectified diffusion and microstreaming phenomena toward mass transfer remain unclear. We quantify the effect of ultrasound on the diffusive growth of a single spherical CO2 bubble growing on a substrate in supersaturated water. The time-dependent bubble size, shape, oscillation amplitude, and microstreaming flow field are resolved. We show and explain how ultrasound can enhance the diffusive growth of surface bubbles by up to two orders of magnitude during volumetric resonance. The proximity of the wall forces the bubble to oscillate nonspherically, thereby generating vigorous streaming during resonance that results in convection-dominated growth.

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  • Received 14 November 2019
  • Accepted 11 May 2020

DOI:https://doi.org/10.1103/PhysRevFluids.5.063605

©2020 American Physical Society

Physics Subject Headings (PhySH)

Fluid Dynamics

Authors & Affiliations

Álvaro Moreno Soto1,2,*, Pablo Peñas1,†, Guillaume Lajoinie1, Detlef Lohse1, and Devaraj van der Meer1

  • 1Physics of Fluids Group, Department of Science and Technology, Max-Planck Center Twente for Complex Fluid Dynamics, Mesa+ Institute, and J. M. Burgers Center for Fluid Dynamics, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
  • 2Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA

  • *amorenos@mit.edu
  • p.penaslopez@utwente.nl

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Issue

Vol. 5, Iss. 6 — June 2020

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