Quantifying effective slip length over micropatterned hydrophobic surfaces

  • Tsai P
  • Peters A
  • Pirat C
 et al. 
  • 82


    Mendeley users who have this article in their library.
  • 72


    Citations of this article.


We employ micro-particle image velocimetry ($\mu$-PIV) to investigate laminar micro-flows in hydrophobic microstructured channels, in particular the slip length. These microchannels consist of longitudinal micro-grooves, which can trap air and prompt a shear-free boundary condition and thus slippage enhancement. Our measurements reveal an increase of the slip length when the width of the micro-grooves is enlarged. The result of the slip length is smaller than the analytical prediction by Philip et al. [1] for an infinitely large and textured channel comprised of alternating shear-free and no-slip boundary conditions. The smaller slip length (as compared to the prediction) can be attributed to the confinement of the microchannel and the bending of the meniscus (liquid-gas interface). Our experimental studies suggest that the curvature of the meniscus plays an important role in microflows over hydrophobic micro-ridges.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text


  • Peichun Tsai

  • Alisia M. Peters

  • Christophe Pirat

  • Matthias Wessling

  • Rob G.H. Lammertink

  • Detlef Lohse

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free