Abstract: In this work, we conduct a theoretical analysis of an oscillatory electroosmotic flow in a parallel-plate microchannel taking into account slippage at the microchannel walls. The governing equations given by the Poisson-Boltzmann (with the Debye Huckel approximation) and momentum equations are nondimensionalized from which four dimensionless parameters appear:an Reynolds angular number, the ratio between the zeta potentials of the microchannel walls, the electrokinetic parameter and the dimensionless slip length which measures the competition between the Navier slip length and the half height microchannel.The principal results indicate that the slippage has a strong influence on the magnitude of the oscillatory electroosmotic flow increasing the velocity magnitude up to 50% for the numerical values used in this work.

• Publication Date: 28-Oct-2018
• DOI: 10.15224/978-1-63248-163-4-23
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Abstract: In this paper, numerical study was conducted on perforated pipes with phasing angle 180 degree and 90 degree respectively. The calculation were carried out with ANSYS FLUENT 15.01 using k-E (RNG) model. It concluded from results there is no change in acceleration and frictional wall pressure between 180 degree and 90 degree perforation phasing. Total pressure drop in 90 degree perforation phasing has the highest value compared with 180 phasing angles due to intensified influence of mixing pressure drop. The decreases in additional pressure drop in 90 degree phasing has the lower value in compared to additional pressure drop at 180 degree phasing this is due to intensified influence of mixing effects pressure drop.

• Publication Date: 28-Oct-2018
• DOI: 10.15224/978-1-63248-163-4-36
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