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Kondratyuk N, Ryltsev R, Ankudinov V, Chtchelkatchev N. First-principles calculations of the viscosity in multicomponent metallic melts: Al-Cu-Ni as a test case. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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Hilaire L, Siboulet B, Charton S, Dufrêche JF. Liquid-Liquid Flow at Nanoscale: Slip and Hydrodynamic Boundary Conditions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:2260-2273. [PMID: 36719852 DOI: 10.1021/acs.langmuir.2c02856] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Nonequilibrium molecular dynamics (NEMD) simulations have been performed to describe the flow of a fluid nanolayer confined by another fluid. The results show that the behavior of liquids can still be described by the Navier-Stokes equation at the nanoscale, i.e., when only few molecular layers are involved. NEMD furthermore gives additional knowledge on flow. Indeed, while a very small slip is evidenced for a solid-liquid interface as, e.g., in lubrication, the slip lengths are significantly larger at the liquid-liquid interface, as encountered, e.g., in droplet coalescence. The slip lengths of the two fluids are linked. The increase in hydrodynamic slip for liquid-liquid interfaces is attributed to the enhancement of fluid diffusion, which reduces friction.
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Affiliation(s)
- Lolita Hilaire
- CEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, 30207, France
- Centre CEA Marcoule, BP 17171 30207, Bagnols-sur-Cèze Cedex, France
| | - Bertrand Siboulet
- Centre CEA Marcoule, BP 17171 30207, Bagnols-sur-Cèze Cedex, France
- ICSM, CEA, CNRS, Univ Montpellier, Marcoule, 30207, France
| | - Sophie Charton
- CEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, 30207, France
- Centre CEA Marcoule, BP 17171 30207, Bagnols-sur-Cèze Cedex, France
| | - Jean-François Dufrêche
- Centre CEA Marcoule, BP 17171 30207, Bagnols-sur-Cèze Cedex, France
- ICSM, CEA, CNRS, Univ Montpellier, Marcoule, 30207, France
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Couette flow of pentane in clay nanopores: Molecular dynamics simulation. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Bakulin I, Kondratyuk N, Lankin A, Norman G. Properties of aqueous 1,4-dioxane solution via molecular dynamics. J Chem Phys 2021; 155:154501. [PMID: 34686058 DOI: 10.1063/5.0059337] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Polyethers are promising compounds for the creation of electrochemical energy storage systems. The molecular dynamics method can facilitate the search of compounds that have the most potential. However, the application of this method requires verification of the force fields. We perform molecular dynamics calculations of the physical properties of the aqueous 1,4-dioxane solution (density, enthalpy of mixing, and viscosity) and compare them to the available experimental data. In addition, we confirm the idea that the solution structure depends on the dioxane molar fraction, proposed in the experiment of Takamuku et al. [J. Mol. Liq. 83(1-3), 163-177 (1999)]. The hydrogen bonds between dioxane and water are analyzed. The correlation between the excess viscosity and enthalpy of mixing is demonstrated.
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Affiliation(s)
- I Bakulin
- Moscow Institute of Physics and Technology (National Research University), 141700 Dolgoprudnyi, Russia
| | - N Kondratyuk
- Moscow Institute of Physics and Technology (National Research University), 141700 Dolgoprudnyi, Russia
| | - A Lankin
- Moscow Institute of Physics and Technology (National Research University), 141700 Dolgoprudnyi, Russia
| | - G Norman
- Moscow Institute of Physics and Technology (National Research University), 141700 Dolgoprudnyi, Russia
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dos Santos TJ, Abreu CR, Horta BA, Tavares FW. Self-diffusion coefficients of methane/n-hexane mixtures at high pressures: An evaluation of the finite-size effect and a comparison of force fields. J Supercrit Fluids 2020. [DOI: 10.1016/j.supflu.2019.104639] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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