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

Junghoon Lee; Changhoon Lee

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

Department of Computational Science and Engineering

Research output: Contribution to conference › Paper › peer-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| > 0.9r_max) occurred mainly in strong sweeps than in strong ejections with no strong preferential orientation.

Original language	English
Publication status	Published - 2019 Jan 1
Event	11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019 - Southampton, United Kingdom Duration: 2019 Jul 30 → 2019 Aug 2

Conference

Conference	11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019
Country/Territory	United Kingdom
City	Southampton
Period	19/7/30 → 19/8/2

All Science Journal Classification (ASJC) codes

Atmospheric Science
Aerospace Engineering

Cite this

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title = "A direct numerical simulation study of polymers in near-wall turbulence",

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.",

author = "Junghoon Lee and Changhoon Lee",

year = "2019",

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language = "English",

note = "11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019 ; Conference date: 30-07-2019 Through 02-08-2019",

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T1 - A direct numerical simulation study of polymers in near-wall turbulence

AU - Lee, Junghoon

AU - Lee, Changhoon

PY - 2019/1/1

Y1 - 2019/1/1

N2 - 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.

AB - 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.

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M3 - Paper

T2 - 11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019

Y2 - 30 July 2019 through 2 August 2019

ER -

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

Abstract

Conference

All Science Journal Classification (ASJC) codes

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