A direct numerical simulation study of polymers in near-wall turbulence

Junghoon Lee, Changhoon Lee

Research output: Contribution to conferencePaperpeer-review

Abstract

We investigated the dynamics of polymers in near-wall turbulence through a direct numerical simulation of turbulent channel flow, along with Brownian dynamics simulation. On average, polymer stretching is most pronounced in the streamwise direction at y+ ≈ 10. Consistent with the previous finding, our numerical results indicate that polymers are stretched in the streamwise direction as they travel in strong ejections. However, very strong stretching of polymers (i.e. with |r| > 0.9rmax) occurred mainly in strong sweeps than in strong ejections with no strong preferential orientation.

Original languageEnglish
Publication statusPublished - 2019
Event11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019 - Southampton, United Kingdom
Duration: 2019 Jul 302019 Aug 2

Conference

Conference11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019
CountryUnited Kingdom
CitySouthampton
Period19/7/3019/8/2

Bibliographical note

Funding Information:
This research was partially supported by the Graduate School of YONSEI University Research Scholarship Grants in 2017.

Publisher Copyright:
© 2019 International Symposium on Turbulence and Shear Flow Phenomena, TSFP. All rights reserved.

All Science Journal Classification (ASJC) codes

  • Atmospheric Science
  • Aerospace Engineering

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