Wave Analysis of Oscillatory Fingers in Microchannel

Zuonaki Ongodiebi and Ukeh Tobias C. O
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Zuonaki Ongodiebi: Department of Mathematics and Computer Science, Niger Delta University, Bayelsa State Nigeria
Ukeh Tobias C. O: Department of Mathematics, Michael Okpara University of Agriculture, Umudike Abia State Nigeria

Noble International Journal of Scientific Research, 2017, vol. 1, issue 2, 50-54

Abstract: We present an experimental study and characterize the dynamics of the propagation modes that occur due to the displacement of a viscous fluid by an air finger through microchannels with centered rectangular occlusions. Furthermore, we extent the result of our recent work [1] by investigating the wave front exhibited by oscillatory fingers as the capillary number Ca=?U/? (which is the ratio of viscous to surface tension forces, where ? is the fluid viscosity, U is the velocity of the finger and  ?, the surface tension) increases. We found that the wavelength of an oscillatory finger decreases as the Ca increases while Ltip increases with Ca.

Keywords: Bifurcation; Fingers; Microfluidics; Stability; Transition (search for similar items in EconPapers)
Date: 2017
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