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Author Bahrami, Amir Houshang ♦ Jalali, Mir Abbas
Source arXiv.org
Content type Text
File Format PDF
Date of Submission 2009-12-12
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Physics
Subject Keyword Physics - Fluid Dynamics ♦ Physics - Chemical Physics ♦ physics:physics
Abstract Macroscale experiments show that a train of two immiscible liquid drops, a bislug, can spontaneously move in a capillary tube because of surface tension asymmetries. We use molecular dynamics simulation of Lennard-Jones fluids to demonstrate this phenomenon for NVT ensembles in sub-micron tubes. We deliberately tune the strength of intermolecular forces and control the velocity of bislug in different wetting and viscosity conditions. We compute the velocity profile of particles across the tube, and explain the origin of deviations from the classical parabolae. We show that the self-generated molecular flow resembles the Poiseuille law when the ratio of the tube radius to its length is less than a critical value.
Educational Use Research
Learning Resource Type Article
Page Count 7


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