Can the principle of maximum entropy production be used to predict the steady states of a Rayleigh-Bernard convective system?


Weaver, Iain S., Dyke, J.G. and Oliver, K.I.C. (2012) Can the principle of maximum entropy production be used to predict the steady states of a Rayleigh-Bernard convective system? In, Dewar, R.C., Lineweaver, C.H., Niven, R.K. and Regenauer-Lieb, Klaus (eds.) Beyond The Second Law: Entropy Production and Non-Equilibrium Systems. New York, US, Springer pp. 277-290.

Download

[img] PDF 2011_benard_convection.pdf - Author's Original
Restricted to Repository staff only

Download (2MB)

Description/Abstract

The principle of Maximum Entropy Production (MEP) has been successfully used to reproduce the steady states of a range of non-equilibrium systems. Here we investigate MEP and maximum heat flux extremum principles directly via the simulation of a Rayleigh-Bernard convective system implemented as a lattice gas model. Heat flux and entropy production emerges in this system via the resolution of particle interactions. In the spirit of other related works, we use a reductionist approach, creating a lattice-Boltzmann model to produce steady-convective states between reservoirs of different temperatures. Convection cells emerge that show meta-stability where a given lattice size is able to support a range of convective states.
Slow expansion and contraction of the model lattice, implemented by addition and subtraction of vertices, shows hysteresis loops where stable convection cells are expanded to regions wherein they become meta-stable, and eventually transition into more stable configurations. The maximally stable state is found to be that which maximises the rate of heat transfer, which is only equivalent to maximum internal entropy production in a strong forcing regime, while it is consistent with minimising entropy production in a weak forcing case. These results demonstrate the utility of lattice-Boltzmann models for future studies of non-equilibrium systems, and highlight the importance of dissipation and forcing rates in disambiguating proposed extremum principles.

Item Type: Book Section
ISBNs: 9783642401534 (print)
Subjects: Q Science > QC Physics
Organisations: Agents, Interactions & Complexity, Physical Oceanography
ePrint ID: 343282
Date :
Date Event
August 2012Submitted
November 2012Accepted/In Press
2014Published
Date Deposited: 02 Oct 2012 14:36
Last Modified: 17 Apr 2017 16:34
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/343282

Actions (login required)

View Item View Item