{"title":"Flow inside Micro-Channel Bounded by Superhydrophobic Surface with Eccentric Micro-Grooves","authors":"Yu Chen, Weiwei Ren, Xiaojing Mu, Feng Zhang, Yi Xu","volume":129,"journal":"International Journal of Mechanical and Mechatronics Engineering","pagesStart":1579,"pagesEnd":1585,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10007909","abstract":"The superhydrophobic surface is widely used to reduce
\r\nfriction for the flow inside micro-channel and can be used to
\r\ncontrol\/manipulate fluid, cells and even proteins in lab-on-chip.
\r\nFabricating micro grooves on hydrophobic surfaces is a common
\r\nmethod to obtain such superhydrophobic surface. This study
\r\nutilized the numerical method to investigate the effect of eccentric
\r\nmicro-grooves on the friction of flow inside micro-channel. A detailed
\r\nparametric study was conducted to reveal how the eccentricity of
\r\nmicro-grooves affects the micro-channel flow under different grooves
\r\nsizes, channel heights, Reynolds number. The results showed that
\r\nthe superhydrophobic surface with eccentric micro-grooves induces
\r\nless friction than the counter part with aligning micro-grooves, which
\r\nmeans requiring less power for pumps.","references":"[1] H. A. Stone, A. D. Stroock, A. Ajdari, Engineering flows in small\r\ndevices: microfluidics toward a lab-on-a-chip, Annu. Rev. Fluid Mech.\r\n36 (2004) 381\u2013411.\r\n[2] G. Hagen, Uber den Einfluss der Temperatur auf die Bewegung des\r\nWasser in R\u00a8ohren, Math. Abh. Akad. Wiss. 17.\r\n[3] H. Darcy, Recherches exp\u00b4erimentales relatives au mouvement de l\u2019eau\r\ndans les tuyaux, Mallet-Bachelier, 1857.\r\n[4] J. Nikuradse, Str\u00a8omungsgesetze in Rauhen Rohren,\r\nVDI-Forschungscheft 361; also NACA TM 1292 (1950) .\r\n[5] L. F. Moody, N. J. Princeton, Friction factors for pipe flow, Trans. ASME\r\n66 (8) (1944) 671\u2013684.\r\n[6] R. Garc\u00b4\u0131a-Mayoral, J. Jim\u00b4enez, Drag reduction by riblets, Philosophical\r\nTransactions of the Royal Society of London A: Mathematical, Physical\r\nand Engineering Sciences 369 (1940) (2011) 1412\u20131427.\r\n[7] J. P. 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