Particle-turbulence interaction in near-wall turbulence

Junghoon Lee, Changhoon Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Turbulence modifications due to the presence of particles are investigated using direct numerical simulations of turbulent channel flow. It is shown that a Stokes number plays a key role in the turbulence modification behavior for particles smaller than the Kolomogorov length scale of the fluid. Particles with the Stoke number, St+, of 0.25 in wall units enhance turbulence near the wall, while particles with St+ = 20 attenuate it throughout the channel. This can be explained in terms of energy exchange between the two phases around streamwise vortices. It is found that the low- and high-Stokes-number particles, respectively, contributed to the positive and negative energy production around streamwise vortices.

Original languageEnglish
Title of host publicationInternational Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013
PublisherTSFP-8
ISBN (Electronic)9780000000002
Publication statusPublished - 2013 Jan 1
Event8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013 - Poitiers, France
Duration: 2013 Aug 282013 Aug 30

Publication series

NameInternational Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013
Volume2

Other

Other8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013
CountryFrance
CityPoitiers
Period13/8/2813/8/30

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes

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  • Cite this

    Lee, J., & Lee, C. (2013). Particle-turbulence interaction in near-wall turbulence. In International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013 (International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013; Vol. 2). TSFP-8.