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.
|Publication status||Published - 2019|
|Event||11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019 - Southampton, United Kingdom|
Duration: 2019 Jul 30 → 2019 Aug 2
|Conference||11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019|
|Period||19/7/30 → 19/8/2|
Bibliographical noteFunding Information:
This research was partially supported by the Graduate School of YONSEI University Research Scholarship Grants in 2017.
© 2019 International Symposium on Turbulence and Shear Flow Phenomena, TSFP. All rights reserved.
All Science Journal Classification (ASJC) codes
- Atmospheric Science
- Aerospace Engineering