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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Pacheco, J. Rafael Chen, Kangping Pacheco-Vega, Arturo |
| Copyright Year | 2009 |
| Abstract | In the current work, the mixing of a diffusive passive-scalar, e.g., thermal energy or species concentration, driven by electro-osmotic fluid motion being induced by an applied potential across a micro-channel is studied numerically. Secondary time-dependent periodic or random electric fields, orthogonal to the main stream, are applied to generate cross-sectional mixing. This investigation focuses on the mixing dynamics and its dependence on the frequency (period) of the driving mechanism. For periodic flows, the probability density function (PDF) of the scaled passive scalar (i.e., concentration), settles into a self-similar curve showing 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. The present study confirms an exponential decay of the variance of the concentration for the periodic and random flows. |
| Sponsorship | Heat Transfer Division |
| Starting Page | 527 |
| Ending Page | 535 |
| Page Count | 9 |
| File Format | |
| ISBN | 9780791843581 |
| DOI | 10.1115/HT2009-88626 |
| e-ISBN | 9780791838518 |
| Volume Number | Volume 3: Combustion, Fire and Reacting Flow; Heat Transfer in Multiphase Systems; Heat Transfer in Transport Phenomena in Manufacturing and Materials Processing; Heat and Mass Transfer in Biotechnology; Low Temperature Heat Transfer; Environmental Heat Transfer; Heat Transfer Education; Visualization of Heat Transfer |
| Conference Proceedings | ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences |
| Language | English |
| Publisher Date | 2009-07-19 |
| Publisher Place | San Francisco, California, USA |
| Access Restriction | Subscribed |
| Subject Keyword | Fluids Dynamics (mechanics) Probability Scalars Flow (dynamics) Density Electric fields Thermal energy Microchannels |
| Content Type | Text |
| Resource Type | Article |
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