Hydrodynamics Analysis of Air Flow over Pitted Surface

Abstract:

The pits is a typical biomimetic surface morphology, typically it is beneficial to reduce the flow drag on the wall surface. In this paper, a method combining theoretical analysis and numerical simulation is adopted, it carries out a flow and stress analysis on the wall surface distributed by 3mm-diameter pits with typical bionic surface morphology, reveals the forms down stream flow field and the pit internal as well as the distribution of stress, it also analyzes the relationship between the viscous drag of the pit wall surface, the pressure drag and the flow drag, comparing the size of the downstream shear stress of the smooth wall and wall surface distributed with pits, investigates the mechanism of the downstream shear stress decreases on the biomimetic pit wall surface.

• Periodical: Applied Mechanics and Materials (Volume 461)
• Pages: 712-724
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.461.712
• Online since: November 2013
• Authors: Xue Peng Zhang, Yong Hua Wang, Lei Shi
• Keywords: Bionic, Drag Reduction, Fluid Mechanics, Pit

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