Journal
NEW JOURNAL OF PHYSICS
Volume 10, Issue -, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/10/11/113022
Keywords
-
Categories
Funding
- DFG [SPP 1164]
- BMBF
Ask authors/readers for more resources
The design of tailor-made nanofluidic devices requires an extension of macroscale hydrodynamic theories for capillary impregnation (CI). Large-scale molecular dynamics (MD) simulations of a simple capillary pump consisting of a nanoscale gold slit attached to a liquid propane reservoir reveal that distinct finite-size-effects impact CI on the nanoscale. A continuum theory is derived that captures these finite-size-effects: properties of a prewetting monolayer, a related Navier-slip, nanoscopic contact angles and wall-induced oscillatory pressure fluctuations enter as non-heuristic atomistic input into the derivation of extended lubrication equations that exactly reproduce the capillary rise dynamics and menisci from our MD simulations. It turns out that impregnation in bare nanochannels can be significantly accelerated by the strong slip induced by a spreading precursor. As expected, this effect is absent in micron sized channels, where our extended continuum theory predicts a capillary dynamics that is already insensitive to all nanoscopic details at the contact line.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available