Journal
PHYSICS OF FLUIDS
Volume 19, Issue 12, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2784532
Keywords
-
Categories
Ask authors/readers for more resources
This paper presents a semianalytical solution to study the flow behavior of periodical electro-osmosis in a rectangular microchannel based on a nonlinear Poisson-Boltzmann equation and Navier-Stokes equation. The analytical results indicate that the velocity of periodical electro-osmosis strongly depends on the Reynolds number R-e=omega H-2/nu, the properties of electric double layer, and the applied electric field. When the Reynolds number is low, the velocity amplitude of periodical electro-osmosis is the same as that of steady electro-osmosis, and it shows a square plug-like profile. When the Reynolds number is high, the velocity of periodical electro-osmosis decreases rapidly from the solid wall to the channel center, and it shows a bowl-like velocity profile varying with time. It is also found that the slip velocity of periodical electro-osmosis and its instantaneous flow rate in a microchannel decrease as the Reynolds number increases. Numerical solutions are also given in this paper, which are in good agreement with the semianalytical solutions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available