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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

VISCOUS DISSIPATION INFLUENCE ON NANOSCALE LIQUID METAL FLOWS

Get access (open in a dialog) DOI: 10.1615/IHTC16.cov.022295
pages 2757-2774

Résumé

It has become more and more important to explore the flow and heat transfer characteristics of liquid metal and apply them in industrial manufacture. MD simulation study on 3D shear-driven flow to a liquid metal lead film in a nano channel is performed on the Newton's second law to simulate the particles' interactions and consists of several important processing methods, such as the thermal wall model, the cut-off radius, and the initial condition. Upper and lower walls move in opposite directions at the same velocity, with the interatomic interaction being modeled by an EAM potential function. The role of shear velocity on velocity profiles, temperature profiles and atomic number density are all discussed and analyzed. The study reveals significant impact of slip velocity on the velocity profiles at different sections of the nanotube. The results indicate that the temperature jump at liquid−solid interfaces is observed irrespective of surface condition, which intensifies the energy transfer between liquids and solid surface and hence contributes to large thermal resistance at a liquid-solid interface. Significant viscous dissipation in 3D shear-driven thin liquid metal flow is observed with appreciable temperature change in the nano channel. Velocity, temperature and atomic number density distribution analysis is used to infer the mechanisms controlling the heat transfer process. Furthermore, velocity slip and shear velocity gradient at the lower and upper wall distribution results in a constant in the slip length regardless of the value of the shear velocities.