Disjoining Pressure of Water in Nanochannels

19 Oct 2020  ·  An Zou, Sajag Poudel, Manish Gupta, Shalabh C. Maroo ·

Experiments of water wicking in 1D silicon-dioxide nanochannels of heights 59 nm, 87 nm, 124 nm and 1015 nm are used to estimate the disjoining pressure of water which was found to be as high as ~1.5 MPa while exponentially decreasing with increasing channel height. Such a relation resulting from curve fitting of experimentally-derived data was implemented and validated in computational fluid dynamics. This methodology integrates experimental nanoscale physics into continuum simulations thus enabling the numerical study of various phenomena where disjoining pressure plays an important role.

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Fluid Dynamics Mesoscale and Nanoscale Physics Applied Physics