Source :
3rd International Conference on Microchannels and Minichannels
Abstract :
Electrokinetic phenomena play an important role in
microfluidic transport behavior. Review of literature suggests
that surface energetic can also be an important factor, but rarely
explored. Typically, surface energetic is taken into account by
consideration as an arbitrarily selected slip boundary condition
in the modified Navier-Stokes equation. In this paper, instead
of selecting this arbitrary slip condition, we examine how solidliquid
energy parameters influence the transport of
microfluidics in terms of streaming potential. The simultaneous
effects of surface energetics and electrokinetics will be
conducted by means of a mean-field free energy lattice
boltzmann approach recently proposed. Rather than using the
conventional Navier-Stokes equation with a slip condition, the
description solid-liquid energetic is manifested by the more
physical energy parameters in the mean-field description of the
method. As a result, the magnitude of liquid slip can be related
directly to the solid-liquid interfacial slip. These results will be
employed in conjunction with the description of electrokinetic
transport phenomena for streaming potential. The variation of
streaming potential as a function of the energy parameters
(solid-liquid interaction) is clearly demonstrated. In pressuredriven
liquid microfluidics, the flow rate may be decreased due
to the counter-effect between the electrokinetic and slip.
Title of Article :
Effect of Solid-Fluid Energy Parameters on Streaming Potential and Flow Rate in Pressure-Driven Flow in Microchannels
Author/Authors :
Tian, Fuzhi , Zhang, Junfeng , Kwok, Daniel Y.
Author/Authors - جزئيات :
