Implementation of Near-Surface Disjoining Pressure Effect in Continuum Simulations

An expression of disjoining pressure in a water film, as a function of distance from the surface, is developed from prior experimental findings. The expression is implemented in commercial computational fluid dynamics solver and disjoining pressure effect on water wicking in nanochannels of height v...

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Bibliographic Details
Published in:arXiv.org 2021-06
Main Authors: Poudel, Sajag, Zou, An, Maroo, Shalabh C
Format: Article
Language:English
Subjects:
Computational fluid dynamics
Fluidics
Molecular interactions
Nanochannels
Nanofluids
Pressure effects
Simulation
Water film
Online Access:Get full text
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Summary:An expression of disjoining pressure in a water film, as a function of distance from the surface, is developed from prior experimental findings. The expression is implemented in commercial computational fluid dynamics solver and disjoining pressure effect on water wicking in nanochannels of height varying from 59 nm to 1 micron is simulated. The simulation results are in excellent agreement with experimental data, thus demonstrating and validating that near-surface molecular interactions can be integrated in continuum numerical simulations through the disjoining pressure term. Such an implementation can be used to design and advance nanofluidics-based engineering systems.
ISSN:2331-8422