Name
Abstract | ||
|---|---|---|
In this paper, drag reduction in turbulent channel is studied by LES WALE model. The channel flow is initialized to modulate the coherent structure near the wall region and thus generate fully developed turbulent channel flow. The skin-friction is calculated in terms of oscillation parameters which matter most to drag reduction. The case of optimal drag reduction effect is chosen to draw out the mechanism of drag reduction. The fluid properties are under review by turbulence statistics. The results indicate that the velocity gradient declines and the viscous sublayer becomes thicker. In addition, some other established turbulence statistics similarly reduce to a certain extent. Most notably, the Reynolds shear stress which contributes much to drag reduction also decreases. The potential mechanism of drag reduction can be interpreted as weakening of near-wall coherent structures. |
Year | DOI | Venue |
|---|---|---|
2019 | 10.1109/ICARM.2019.8834155 | 2019 IEEE 4TH INTERNATIONAL CONFERENCE ON ADVANCED ROBOTICS AND MECHATRONICS (ICARM 2019) |
Keywords | Field | DocType |
spanwise oscillating wall, LES WALE model, drag reduction, boundary layer, turbulence statistics | Drag,Oscillation,Velocity gradient,Shear stress,Turbulence,Boundary layer,Mechanics,Laminar sublayer,Open-channel flow,Physics | Conference |
Citations | PageRank | References |
0 | 0.34 | 0 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Haijun Dong | 1 | 0 | 0.68 |
| Yongtian Zhang | 2 | 0 | 0.68 |
| Fei Deng | 3 | 0 | 3.04 |
| Wei Liu | 4 | 1519 | 103.13 |