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Atomistic long-term simulation of heat and mass transport

Venturini, G. and Wang, K. and Romero, I. and Ariza, M. P. and Ortiz, M. (2014) Atomistic long-term simulation of heat and mass transport. Journal of the Mechanics and Physics of Solids, 73 . pp. 242-268. ISSN 0022-5096. http://resolver.caltech.edu/CaltechAUTHORS:20141015-093205200

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Abstract

We formulate a theory of non-equilibrium statistical thermodynamics for ensembles of atoms or molecules. The theory is an application of Jayne's maximum entropy principle, which allows the statistical treatment of systems away from equilibrium. In particular, neither temperature nor atomic fractions are required to be uniform but instead are allowed to take different values from particle to particle. In addition, following the Coleman-Noll method of continuum thermodynamics we derive a dissipation inequality expressed in terms of discrete thermodynamic fluxes and forces. This discrete dissipation inequality effectively sets the structure for discrete kinetic potentials that couple the microscopic field rates to the corresponding driving forces, thus resulting in a closed set of equations governing the evolution of the system. We complement the general theory with a variational meanfield theory that provides a basis for the formulation of computationally tractable approximations. We present several validation cases, concerned with equilibrium properties of alloys, heat conduction in silicon nanowires and hydrogen desorption from palladium thin films, that demonstrate the range and scope of the method and assess its fidelity and predictiveness. These validation cases are characterized by the need or desirability to account for atomic-level properties while simultaneously entailing time scales much longer than those accessible to direct molecular dynamics. The ability of simple meanfield models and discrete kinetic laws to reproduce equilibrium properties and long-term behavior of complex systems is remarkable.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.jmps.2014.09.008DOIArticle
http://www.sciencedirect.com/science/article/pii/S002250961400194X#PublisherArticle
Additional Information:© 2014 Elsevier Ltd. Received date: 1 February 2014; revised date: 29 May 2014; accepted date: 18 September 2014; Available online 30 September 2014. G.V. and M.O. gratefully acknowledge the support of the Department of Energy (DoE) National Nuclear Security Administration (NNSA) under Award Number DE-FC52-08NA28613 through Caltech’s ASC/PSAAP Center for the Predictive Modeling and Simulation of High Energy Density Dynamic Response of Materials as well as the support from the Lawrence Livermore National Laboratory (LLNL) through Sponsor Award No. B579041 from Prime Contract No. DE-AC52-07NA27344. M.O. and K.W. gratefully acknowledge support from the U. S. Army Research Laboratory (ARL) through the Materials in Extreme Dynamic Environments (MEDE) Collaborative Research Alliance (CRA) under Award Number W911NF-11-R-0001. Support from the Caja Madrid foundation for the sabbatical stay of I.R. at Caltech is gratefully acknowledged. P.A. gratefully acknowledges the support of the Ministerio de Economía y Competitividad of Spain (DPI2012-32508).
Funders:
Funding AgencyGrant Number
Department of Energy (DOE) National Nuclear Security AdministrationDE-FC52-08NA28613
Department of Energy (DOE)DE-AC52-07NA27344
Army Research Office (ARO)W911NF-11-R-0001
Caja Madrid foundationUNSPECIFIED
Ministerio de Economía y Competitividad (MINECO)DPI2012-32508
Subject Keywords:Non-equilibrium statistical thermodynamics; Binary alloys; Meanfield theory; Variational updates; Slow kinetic processes
Record Number:CaltechAUTHORS:20141015-093205200
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20141015-093205200
Official Citation:G. Venturini, K. Wang, I. Romero, M.P. Ariza, M. Ortiz, Atomistic long-term simulation of heat and mass transport, Journal of the Mechanics and Physics of Solids, Volume 73, 15 December 2014, Pages 242-268, ISSN 0022-5096, http://dx.doi.org/10.1016/j.jmps.2014.09.008. (http://www.sciencedirect.com/science/article/pii/S002250961400194X)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50397
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:15 Oct 2014 22:52
Last Modified:16 Oct 2015 21:53

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