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Proceedings of the 3rd International Conference on Molecular Simulation

Multiscale simulation for thermo-hydrodynamic lubrication of a polymeric liquid between parallel plates

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Pages 1002-1005 | Received 31 Jan 2014, Accepted 31 Jul 2014, Published online: 22 Sep 2014
 

Abstract

Thermo-hydrodynamic lubrication of a polymeric liquid composed of short chains between parallel plates is analysed by a multi-scale simulation, i.e. the synchronised molecular dynamics simulation via macroscopic heat and momentum transfer, which has been recently developed by us. The rheological properties and conformation of polymer chains coupled with the temperature rise caused by local viscous heating are investigated with a non-dimensional parameter, i.e. the Nahme–Griffith number, which is defined by the ratio of the viscous heating to the thermal conduction at the characteristic temperature required to sufficiently change the viscosity. The present simulation demonstrates that strong shear thinning and transitional behaviour of the conformation of the polymer chains occurs with a rapid temperature rise when the Nahme–Griffith number exceeds unity.

Funding

This research was partially supported by the Grand-in-Aid from Hyogo Science and Technology Association.

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