采用LES方法和虚拟粗糙元模型,,模拟了Rer=180有粗糙壁面的充分发展槽道湍流流动.从流向平均速度、脉动速度均方根、雷诺剪切应力、脉动速度相关,以及瞬时近壁准流向涡结构等多个方面,对粗糙壁面湍流边界层流动和拟序结构进行了分析.结果表明,粗糙壁面处雷诺剪切应力、脉动速度均方根以及近壁条带平均距离和准流向涡尺度都大于光滑壁面,且随着粗糙元高度的增加这种趋势更加明显.本工作为进一步研究颗粒在近壁区域的弥散规律奠定了基础.
参考文献
| [1] | Rouson DWI.;Eaton JK. .On the preferential concentration of solid particles in turbulent channel flow[J].Journal of Fluid Mechanics,2001(0):149-169. |
| [2] | Krogstad P;Antonia RA .Structure of turbulent boundary layers on smooth and rough walls[J].Journal of Fluid Mechanics,1994,277:1-20. |
| [3] | Krogstad P;Antonia RA;Browne WB .Comparison between rough-and smooth-wall turbulent boundary layers[J].Journal of Fluid Mechanics,1992,245:599-610. |
| [4] | Shafi HS.;Antonia RA. .SMALL-SCALE CHARACTERISTICS OF A TURBULENT BOUNDARY LAYER OVER A ROUGH WALL[J].Journal of Fluid Mechanics,1997(0):263-293. |
| [5] | Miyake Y;Tsujimoto K;Agata Y .A DNS of Turbulent Flow in a Rough-Wall Channle Using Roughness Elements Model[J].JSME International Journal Series B:Fluids and Thermal Engineering,2000,43(02):233-242. |
| [6] | Kim J;Moin P;Moser R .Turbulence statistics in fully developed oped channel flow at low Reynolds number J[J].Fluid Mechanics,1987,177:133-166. |
| [7] | Bhaganagar K;Kim J;Coleman G .Effect of roughness on wall-bounded turbulence[J].Flow, turbulence and combustion,2004(2/4):463-492. |
| [8] | Lombardi P;De Angelis V;Banerjee,S .Direct numerical simulation of near-interface turbulence in coupled gasliquid flow[J].Physics of Fluids,1996,8:1643-1665. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%