Ultrasound-enhanced mass transfer during single-bubble diffusive growth Articles uri icon

authors

  • MORENO SOTO, ALVARO
  • PE√ĎAS LOPEZ, PABLO
  • LAJOINIE, GUILLAUME
  • LOHSE, DETLEF
  • VAN DER MEER, DEVARAJ

publication date

  • June 2020

start page

  • 063605

issue

  • 6

volume

  • 5

International Standard Serial Number (ISSN)

  • 2469-990X

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
    CO
    2
    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.

subjects

  • Industrial Engineering
  • Materials science and engineering
  • Mechanical Engineering
  • Physics

keywords

  • cavitation; drop & bubble phenomena; drops & bubbles; multiphase flows; ultrasonics; microbubbles