Energy conversion and generation mechanisms at nano-scales often include tapping power from pressure-driven flow of water containing dissolved salts in nanofluidic channels. The deviation of such flows from continuum behaviour can often be advantageously utilized to enhance the energy conversion efficiency. Here, by executing molecular dynamics simulations, we pinpoint alterations in effective stick-slip at the solid-liquid interface as a function of variation in the nature of the salt as well as salt solution concentration for different substrate wettabilities, which could possibly act as a control towards modulating energy conversion efficiencies of nanofluidic devices. Our results reveal that the presence of salt has distinctive effects in wettable and non-wettable channels. Finally, we address the observed slip length deviation quantitatively based on hydration energy of the individual ionic species.
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7 February 2013
Research Article|
February 05 2013
Effect of presence of salt on the dynamics of water in uncharged nanochannels
Chirodeep Bakli;
Chirodeep Bakli
Department of Mechanical Engineering,
Indian Institute of Technology Kharagpur
, Kharagpur 721302, India
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Suman Chakraborty
Suman Chakraborty
Department of Mechanical Engineering,
Indian Institute of Technology Kharagpur
, Kharagpur 721302, India
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J. Chem. Phys. 138, 054504 (2013)
Article history
Received:
October 08 2012
Accepted:
January 15 2013
Citation
Chirodeep Bakli, Suman Chakraborty; Effect of presence of salt on the dynamics of water in uncharged nanochannels. J. Chem. Phys. 7 February 2013; 138 (5): 054504. https://doi.org/10.1063/1.4789586
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