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On the Dependence of the Rate of Decay in Concentration and / or Temperature Distribution for a Passive Scalar in a Micro-mixer and the Frequency of the Advecting Velocity Fields
| Content Provider | Semantic Scholar |
|---|---|
| Author | Pacheco, J. Rafael Chen, Kangping Pacheco-Vega, Arturo |
| Copyright Year | 2009 |
| Abstract | The mixing of a diffusive passive-scalar driven by the motion of liquid induced by an applied potential across a microchannel is studies numerically. Secondary time-dependent periodic or random electric fields orthogonal to the main stream are applied to generate the cross-sectional mixing. Our investigation focuses on the the mixing dynamics and its dependence on the frequency of the driving mechanism. For periodic flows, we document that the probability density function (PDF) of the scaled concentration settles into a self-similar curve; in this case, the scalar field shows spatially repeating patterns. In contrast, for random flows there is a lack of self-similarity in the PDF for the interval of time considered in this investigation. Our study confirms an exponential decay of the variance of concentration for the periodic |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://math.la.asu.edu/~rpacheco/MIXING/TEX/sfcoM1.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
