Drag Reduction Using Lubricant‐Impregnated Anisotropic Slippery Surfaces Inspired by Bionic Fish Scale Surfaces Containing Micro‐/Nanostructured Arrays,Advanced Engineering Materials

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Drag Reduction Using Lubricant‐Impregnated Anisotropic Slippery Surfaces Inspired by Bionic Fish Scale Surfaces Containing Micro‐/Nanostructured Arrays
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2020-09-17 , DOI: 10.1002/adem.202000821
Wanting Rong ₁ , Haifeng Zhang _{1,

2,

3} , Tengjiao Zhang ₁ , Zhigang Mao ₁ , Xiaowei Liu _{1,

2,

3} , Keguan Song ₄

Affiliation

Inspired by the bionic fish scale surfaces containing micro/nanostructured arrays, herein, the applications of lubricant‐impregnated anisotropic slippery surfaces (LIASSs) using laser ablation of aluminum–magnesium alloys are proposed. Different hydrophobic properties are presented on the LIASSs along the parallel direction and the reverse direction defined as directions A and B of bionic fish scale micro/nanostructures. A self‐assembled solid–liquid interface friction test device is set up to demonstrate the drag reduction property of LIASSs. The drag reduction ratios are found to be 51.09% and 44.88% along directions A and B, respectively. With the increase in the velocity, the drag reduction ratios of LIASSs can also be kept near 50%. Simulation models are established to study the drag reduction mechanism of LIASSs in laminar flows. Liquid–liquid repellency has a lubricating effect that can increase mobility and reduce viscous resistance. In this way, it improves the fluidity of the liquid and reduces drag. The drag reduction ratio in direction A is superior to that in direction B for the same flow velocity. The results of the simulation are consistent with the experiments results. LIASSs represents an effective strategy to drag reduction and reducing energy consumption in liquid directional transport and marine vessels.

中文翻译：

使用包含微/纳米结构阵列的仿生鱼鳞表面启发的润滑剂浸渍的各向异性光滑表面来减少阻力

受包含微/纳米结构阵列的仿生鱼鳞表面的启发，本文提出了使用激光烧蚀铝镁合金的润滑剂浸渍的各向异性光滑表面（LIASS）的应用。在LIASS上，沿平行方向和反向方向（定义为仿生鱼鳞微/纳米结构的方向A和B）呈现出不同的疏水性。建立了自组装的固液界面摩擦测试装置，以证明LIASS的减阻性能。发现沿方向A和B的减阻比分别为51.09％和44.88％。随着速度的增加，LIASS的减阻率也可以保持在50％附近。建立了仿真模型来研究层流中LIASS的减阻机理。拒液性具有润滑作用，可以增加流动性并降低粘性。这样，它改善了液体的流动性并减少了阻力。对于相同的流速，A方向的减阻率优于B方向的减阻率。仿真结果与实验结果一致。LIASSs是一种有效的策略，可以减少液体的定向运输和海上航行中的阻力并降低能耗。

更新日期：2020-09-17

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