超疏水表面上方湍流边界层中涡结构的演化
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摘要
从科学家首次研究荷叶的超疏水性质开始,超疏水表面逐渐走入了实验室~([1-3])。作为一种被动减阻方式,超疏水表面减阻具有无需能量输入和系统相对简单的优点,且减阻性能优异,往往大于15%以上。众所周知,湍流边界层中各统计量和涡分布对其壁面切应力影响重大~([4-8]),因此研究湍流边界层流动特征是探究表面湍流减阻研究的必经之路。现有研究发现~([9-14]),超疏水表面可以减弱其上方流场的雷诺应力,并抑制涡结构。
引文
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9 Woolford B,Prince J,Maynes D,et al.Particle image velocimetry characterization of turbulent channel flow with rib patterned superhydrophobic walls.Physics of Fluids,2009,21(8):085106.
10 Martell M B,Rothstein J P,Perot J B.An analysis of superhydrophobic turbulent drag reduction mechanisms using direct numerical simulation.Physics of Fluids,2010,22(6):065102.
11 Park H,Park H,Kim J.A numerical study of the effects of superhydrophobic surface on skin-friction drag in turbulent channel flow.Physics of Fluids,2013,25(11):110815.
12 Lu S,Yao Z H,Hao P F,et al.Drag reduction in ultrahydrophobic channels with micro-nano structured surfaces.Science China Physics,Mechanics and Astronomy,2010,53(7):1298-1305.
13 Zhang J,Tian H,Yao Z,et al.Mechanisms of drag reduction of superhydrophobic surfaces in a turbulent boundary layer flow.Experiments in Fluids,2015,56(9):1-13.
14 Zhang J,Tian H,Yao Z,et al.Evolutions of hairpin vortexes over a superhydrophobic surface in turbulent boundary layer flow.Physics of Fluids,2016,28(9):095106.
2 Neinhuis C,Barthlott W.Characterization and distribution of water-repellent,self-cleaning plant surfaces J.Annals of botany,1997,79(6):667-677.
3 Ou J,Perot B,Rothstein J P.Laminar drag reduction in microchannels using ultrahydrophobic surfaces.Physics of Fluids,2004,16(12):4635-4643.
4 Fukagata K,Iwamoto K,Kasagi N.Contribution of Reynolds stress distribution to the skin friction in wall-bounded flows.Physics of Fluids,2002,14(11):L73-L76.
5 Bernard P S,Thomas J M,Handler R A.Vortex dynamics and the production of Reynolds stress.Journal of Fluid Mechanics,1993,253:385-419.
6 Kida S,Tanaka M.Reynolds stress and vortical structure in a uniformly sheared turbulence.Journal of the Physical Society of Japan,1992,61(12):4400-4417.
7 Adrian R J,Christensen K T,Liu Z C.Analysis and interpretation of instantaneous turbulent velocity fields.Experiments in fluids,2000,29(3):275-290.
8 Adrian R J,Meinhart C D,Tomkins C D.Vortex organization in the outer region of the turbulent boundary layer.Journal of Fluid Mechanics,2000,422:1-54.
9 Woolford B,Prince J,Maynes D,et al.Particle image velocimetry characterization of turbulent channel flow with rib patterned superhydrophobic walls.Physics of Fluids,2009,21(8):085106.
10 Martell M B,Rothstein J P,Perot J B.An analysis of superhydrophobic turbulent drag reduction mechanisms using direct numerical simulation.Physics of Fluids,2010,22(6):065102.
11 Park H,Park H,Kim J.A numerical study of the effects of superhydrophobic surface on skin-friction drag in turbulent channel flow.Physics of Fluids,2013,25(11):110815.
12 Lu S,Yao Z H,Hao P F,et al.Drag reduction in ultrahydrophobic channels with micro-nano structured surfaces.Science China Physics,Mechanics and Astronomy,2010,53(7):1298-1305.
13 Zhang J,Tian H,Yao Z,et al.Mechanisms of drag reduction of superhydrophobic surfaces in a turbulent boundary layer flow.Experiments in Fluids,2015,56(9):1-13.
14 Zhang J,Tian H,Yao Z,et al.Evolutions of hairpin vortexes over a superhydrophobic surface in turbulent boundary layer flow.Physics of Fluids,2016,28(9):095106.