Int. J. of Nanomanufacturing   »   2015 Vol.11, No.1/2

 

 

Title: Static and dynamic interface characteristics between functional micro-structure and water

 

Authors: Q.S. Bai; X.P. Meng; Y.C. Liang; K. Cheng

 

Addresses:
School of Mechanical and Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China
School of Mechanical and Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China
School of Mechanical and Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China
School of Mechanical and Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China

 

Abstract: The remarkable interface characteristics between micro-structure surface and water have raised great interests. The static and dynamic interface characteristics between functional micro-structure and water exhibit the wettability and drag reduction of the surface micro-structure separately. The computational fluid dynamics (CFD) model was built to simulate the special characteristics of water drops on micro-groove surfaces. Four kinds of micro-groove surfaces, which were V-groove, rectangular groove, sawtooth groove and dome-groove, were investigated. The reduction of fluid resistance on these micro-groove surfaces were found during the simulation. Good drag reduction efficiency on the V-groove surface can be achieved, which proves that the hydrophobic micro-groove surfaces have broad application prospect. Besides this, the simulation witnessed that the structural parameters of grooves have a significant influence on the drag reduction behaviours. The drag reduction mechanisms were also elaborated. Finally, the wettability properties of the proposed micro-groove surfaces were investigated experimentally to validate the simulation results.

 

Keywords: webttability; drag reduction; surface microstructure; computational fluid dynamics; CFD; interface characteristics; simulation; modelling; micro-grooves; surface grooves.

 

DOI: 10.1504/IJNM.2015.070517

 

Int. J. of Nanomanufacturing, 2015 Vol.11, No.1/2, pp.13 - 24

 

Date of acceptance: 25 Oct 2014
Available online: 09 Jul 2015

 

 

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