超疏水表面滑移流动特性数值仿真研究  

Numerical simulation of slip flow characteristics of super-hydrophobic surface

作　　者：黄桥高[1] 潘光[1] 胡海豹[1] 宋保维[1] 

机构地区：[1]西北工业大学航海学院,陕西西安710072

出　　处：《华中科技大学学报（自然科学版）》2013年第2期26-30,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51279165;50835009;51109178);高等学校博士学科点专项科研基金资助项目(20116102120009);陕西省自然科学基础研究计划资助项目(2010JQ1009)

摘　　要：提出了两无限大平行平板间充分发展层流流动的滑移参数计算方法,并基于不连续气层假设的滑移流动模型,在壁面条件中给定无滑移边界面和自由剪切面组成的复合边界条件,对具有规则微观结构的超疏水表面滑移流动特性进行数值仿真研究.数值仿真结果表明:该计算方法不仅能够精确获得超疏水表面滑移长度、滑移速度、流场结构等信息,还可以得到超疏水表面微观结构的几何尺寸对其减阻特性的影响规律.Calculation method for slip parameters of full development laminar flow in two infinity parallel flats was established. On the basis of the slip flow model of gas-layer supposition, a series of numerical simulations on slip flow characteristic of super-hydrophobic surface with regular microstructure were carried out through enacting composite boundary, including no-slip interface and free-shear interface. The simulation results show that the flow field information of slip length, slip velocity and flow field structure of super-hydrophobic surface can he gain accurately by the numerical simulation, and the influence rules of microstructure＇s geometry dimension on drag reduction effect can be disclosed.

关 键 词：超疏水表面 滑移流动特性 滑移长度 滑移速度 无量纲压降比 

分 类 号：O357.1[理学—流体力学]