Direct Numerical Simulation on Drag Reducing Flow by Polymer Additives Using A Spring-Dumbbell Model
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- Direct Numerical Simulation on Drag Reducing Flow by Polymer Additives Using A Spring-Dumbbell Model
- 发表刊物：
- Progress of Computational Fluid Dynamics
- 摘要：
- Abstract: A discrete-element model (spring-dumbbell model) is used to investigate the
mechanism of drag-reduction by adding polymer in a turbulent channel flow of Newtonian fluid
by Direct Numerical Simulations (DNSs). By using this model, the spatial concentration of the
polymer can be obtained numerically. In this paper, the effect of the spring coefficient on the
drag-reduction is studied in detail. The quantitative relations between the drag-reduction rate and
viscoelastic and Reynolds shear stress, etc., are obtained. Discussions are performed to clarify the
relation between the turbulent structure of the polymer drag-reducing flow and the spring
coefficient of the discrete-element model.
Keywords: spring-dumbbell model; DNS; direct numerical simulation; drag-reduction; turbulent
channel flow.
- 合写作者：
- Y. Wang, B. Yu, J. J. Wei, F. C. Li
- 卷号：
- 9
- 页面范围：
- 217-224
- 是否译文：
- 否
- 发表时间：
- 2009-03-18