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
Volume2
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

Other

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

Fingerprint

Turbulence
Vortex flow
Direct numerical simulation
Channel flow
Fluids

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes

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 (Vol. 2). TSFP-8.
Lee, Junghoon ; Lee, Changhoon. / Particle-turbulence interaction in near-wall turbulence. International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013. Vol. 2 TSFP-8, 2013.
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Lee, J & Lee, C 2013, Particle-turbulence interaction in near-wall turbulence. in International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013. vol. 2, TSFP-8, 8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013, Poitiers, France, 13/8/28.

Particle-turbulence interaction in near-wall turbulence. / Lee, Junghoon; Lee, Changhoon.

International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013. Vol. 2 TSFP-8, 2013.

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

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