Numerical Analysis of Drag-Reducing Turbulent Flow by Polymer Injection with Reynolds Stress Model

- Journal title : Transactions of the Korean Society of Mechanical Engineers B
- Volume 24, Issue 1, 2000, pp.1-8
- Publisher : The Korean Society of Mechanical Engineers
- DOI : 10.22634/KSME-B.2000.24.1.1

Title & Authors

Numerical Analysis of Drag-Reducing Turbulent Flow by Polymer Injection with Reynolds Stress Model

Ko, Kang-Hoon; Kim, Kwang-Yong;

Ko, Kang-Hoon; Kim, Kwang-Yong;

Abstract

A modified low-Reynolds-number Reynolds stress model is developed for the calculation of drag-reducing turbulent flows induced by polymer injection. The results without polymer injection are compared with the results of direct numerical simulation to ensure the validity of the basic model. In case of drag reduction, profiles of mean velocity and Reynolds stress components, in two-dimensional channel flow, obtained with a proper value of viscosity ratio are presented and discussed. Computed mean velocity profile is in very good agreement with experimental data. And, the qualitative behavior of Reynolds stress components with the viscosity ratio is also reasonable.

Keywords

Drag Reduction;Low-Re Reynolds Stress Model;Polymer Injection;Channel Flow;Ultimate Profile;Viscosity Ratio;

Language

Korean

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