Abstract
| Language | English |
|---|---|
| Title of host publication | Nanochannels, Microchannels and Minichannels |
| Subtitle of host publication | Proceedings of the 10th International Conference on Nanochannels, Microchannels and Minichannels |
| DOIs | |
| Publication status | Published - 8 Jul 2012 |
| Event | 10th International Conference on Nanochannels, Microchannels and Minchannels - Puerto Rico, Rio Grande, Puerto Rico Duration: 8 Jul 2012 → 12 Jul 2012 |
Conference
| Conference | 10th International Conference on Nanochannels, Microchannels and Minchannels |
|---|---|
| Country | Puerto Rico |
| City | Rio Grande |
| Period | 8/07/12 → 12/07/12 |
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Keywords
- molecular dynamics
- wetting fluid
Cite this
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Dynamic wetting on moving surfaces : A molecular dynamics study. / Ritos, Konstantinos; Dongari, Nishanth; Zhang, Yonghao; Reese, Jason.
Nanochannels, Microchannels and Minichannels: Proceedings of the 10th International Conference on Nanochannels, Microchannels and Minichannels. 2012.Research output: Chapter in Book/Report/Conference proceeding › Chapter
TY - CHAP
T1 - Dynamic wetting on moving surfaces
T2 - A molecular dynamics study
AU - Ritos, Konstantinos
AU - Dongari, Nishanth
AU - Zhang, Yonghao
AU - Reese, Jason
PY - 2012/7/8
Y1 - 2012/7/8
N2 - We report molecular dynamics (MD) simulations of the dynamic wetting of nanoscale droplets on moving surfaces. The dynamic water contact angle and contact angle hysteresis are measured as a function of capillary number on smooth silicon and graphite surfaces. The hydrogen bonding and density profile variations are also reported, and the width of the water depletion layer is evaluated for droplets on three different static surfaces: silicon, graphite and a fictitious super-hydrophobic surface. Our results show that molecular displacements at the contact line are mostly influenced by interactions with the solid surface, while the viscous dissipation effects induced through the movement of surfaces are found to be negligible, especially for hydrophobic surfaces. This finding is in contrast with the wetting dynamics of macroscale droplets, which show significant dependence on the capillary number. This study may yield new insight into surface-wettability characteristics of nano droplets, in particular, developing new boundary conditions for continuum solvers for liquid flows in micro- and nanoscale devices.
AB - We report molecular dynamics (MD) simulations of the dynamic wetting of nanoscale droplets on moving surfaces. The dynamic water contact angle and contact angle hysteresis are measured as a function of capillary number on smooth silicon and graphite surfaces. The hydrogen bonding and density profile variations are also reported, and the width of the water depletion layer is evaluated for droplets on three different static surfaces: silicon, graphite and a fictitious super-hydrophobic surface. Our results show that molecular displacements at the contact line are mostly influenced by interactions with the solid surface, while the viscous dissipation effects induced through the movement of surfaces are found to be negligible, especially for hydrophobic surfaces. This finding is in contrast with the wetting dynamics of macroscale droplets, which show significant dependence on the capillary number. This study may yield new insight into surface-wettability characteristics of nano droplets, in particular, developing new boundary conditions for continuum solvers for liquid flows in micro- and nanoscale devices.
KW - molecular dynamics
KW - wetting fluid
UR - http://proceedings.asmedigitalcollection.asme.org/volume.aspx?conferenceid=3216&volumeid=16017
U2 - 10.1115/ICNMM2012-73179
DO - 10.1115/ICNMM2012-73179
M3 - Chapter
SN - 978-0-7918-4479-3
BT - Nanochannels, Microchannels and Minichannels
ER -