The end of nanochannels
- 793 Downloads
Current theories of nanochannel flow impose no upper bound on flow rates, and predict friction through nanochannels can be vanishingly small. We reassess neglecting channel entry effects in extremely long channels and find violations at the nanoscale. Even in frictionless nanochannels, end effects provide a finite amount of friction. Hence, the speed at which nanochannels transport liquids is limited. Flow-rate and slip-length measurements are reevaluated using calculations which include end-effect friction. End effects are critical for the design of new technological devices and to understand biological transport.
KeywordsNanoscale fluid flow Nanotubes Aquaporin
Mark Johnson provided insight into flows through biological pores. Mitra Hartmann and Alphonso Mondragon provided editorial assistance. This study was funded by a generous grant from the A. K. Barlow foundation.
- Joly L (2011) Capillary filling with giant liquid/solid slip: dynamics of water uptake by carbon nanotubes. arXiv:1107.3819v1 [cond-mat.soft]Google Scholar
- Majumder M, Chopra N, Hinds BJ (2011) Mass transport through carbon nanotube membranes in three different regimes: ionic diffusion and gas and liquid flow. ACS Nano. doi: 10.1021/nn200222g