具有滑移边界圆管层流减阻的CFD模拟  

The CFD Simulations of Laminar Drag Reduction in Circular Pipe with Slip boundary

作　　者：邓旭辉[1] 张平[1] 许福[1] 姜勇[1] 王霞瑜[2] 

机构地区：[1]湘潭大学土木工程与力学学院,湖南湘潭411105 [2]湘潭大学化学学院,湖南湘潭411105

出　　处：《湘潭大学自然科学学报》2005年第1期85-89,共5页Natural Science Journal of Xiangtan University

基　　金：国家自然科学基金资助项目 (10 3 72 0 87) ;湖南省科技厅资助项目 (0 3JZY10 0 2 )

摘　　要：超疏水表面能够减阻的一个重要原因是在流固界面上存在无剪切空气-水界面.从流体力学的角度来看,这个无剪切界面对应着流体中的滑移边界条件,而与此相关的概念是有效滑移长度.采用计算流体动力学方法,引入速度滑移边界条件来模拟超疏水表面的减阻.计算结果表明,在给定的简单模型中,无量纲压降比最高可达19.2 % .The exist of shear-free air water interface at the fluid-solid boundary is one important reason for drag reduction of superhydrophobic surface. From the view of fluid mechanics,the shear-free air water interface corresponds to a slip boundary condition in fluid and relatives to the concept of effective slip length.In this paper,the simulation of drag reduction with superhydrophobic surface was done with computational fluid dynamics method by introducing slip boundary condition of velocity.The results of simulation indicated that the dimensionless pressure drop reduction was up to 19.2%.

关 键 词：层流减阻 有效滑移长度 超疏水表面 计算流体动力学 

分 类 号：O363.2[理学—流体力学] O351.2[理学—力学]