Efficiency of Electropumping in Nanochannels
| Autor: | David Ostler, Sridhar Kumar Kannam, Peter J. Daivis, Federico Frascoli, Billy D. Todd |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Mechanical Engineering Flow (psychology) Bioengineering 02 engineering and technology General Chemistry Carbon nanotube 021001 nanoscience & nanotechnology Condensed Matter Physics law.invention Physics::Fluid Dynamics Molecular dynamics Planar Chemical engineering law Surface modification General Materials Science 0210 nano-technology |
| Zdroj: | Nano letters. 20(5) |
| ISSN: | 1530-6992 |
| Popis: | Electropumping has been shown to be an effective means of inducing a net positive flow in fluids confined within planar nanochannels and carbon nanotubes. In this Letter, we investigate the efficiency of electropumping relative to Couette and Poiseuille flows. We apply a spatially uniform rotating electric field to a fluid confined in a functionalized nanochannel that couples the water's permanent dipole moment resulting in a net positive flow. We then induce a net positive flow in nanochannels for Couette and Poiseuille flows, matching volume flow rates to allow a direct comparison of average power dissipation per unit volume between all flow types. We show that while electropumping is less efficient than Couette flow, it is 4 orders of magnitude more efficient than Poiseuille flow. This suggests that, rather than being a mere novelty, electropumping is a far more energetically efficient means of transporting water compared to conventional pressure driven pumping. |
| Databáze: | OpenAIRE |
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