Two-way interaction between isotropic turbulence and dispersed bubbles

Hyoeun Shim, Changhoon Lee

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Two-way interaction-mediated modification of isotropic turbulence and bubble dispersion is investigated using direct numerical simulations. The asymmetric coupling force on vortical structures generates horizontal force gradients, transiently enhancing the flow vorticity, while the cumulative buoyant transfer induced by bubbles in the downflow regions decreases it by attenuating the horizontal gradients of the downward flow velocity. These vorticity fluctuations affect the non-uniform distortion in the flow dissipation spectrum with a large-scale energy reduction, decreasing the flow dissipation. In addition, the buoyancy force acting on the bubbles affects the bubble distribution. Smaller inhomogeneities in the bubble distribution with turbulence attenuation, owing to the two-way coupling effects, also contribute to the bubble dispersion.

Original languageEnglish
Pages (from-to)1527-1537
Number of pages11
JournalJournal of Mechanical Science and Technology
Volume35
Issue number4
DOIs
Publication statusPublished - 2021 Apr

Bibliographical note

Funding Information:
We acknowledge the support by Samsung Science and Technology Foundation (Grant No. SSTF-BA1702-03).

Publisher Copyright:
© 2021, The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature.

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering

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