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Computational Thermal Sciences: An International Journal
ESCI SJR: 0.249 SNIP: 0.434 CiteScore™: 1.4

ISSN Imprimer: 1940-2503
ISSN En ligne: 1940-2554

Computational Thermal Sciences: An International Journal

DOI: 10.1615/ComputThermalScien.2016015767
pages 515-526

2D PARTICLE MECHANICS SIMULATIONS ON EVOLUTION AND INTERACTIONS OF HEAT CHAINS AND FORCE NETWORKS UNDER STEADY-STATE CONDITIONS

Gulsad Kucuk
Department of Mechanical and Aerospace Engineering, Rutgers University, Piscataway, New Jersey, 08854, USA
Marcial Gonzalez
School of Mechanical Engineering Purdue University 585 Purdue Mall West Lafayette, Indiana 47907-2088, USA
Alberto M. Cuitino
Department of Mechanical and Aerospace Engineering, Rutgers University, Piscataway, NJ, 08854, USA

RÉSUMÉ

Unlike continuum media, granular materials host an inhomogeneous distribution of contact networks, which results in an uneven distribution of loads inside the dense particulate assemblies. These structural arrangements play a critical role in determining the preferred paths of heat transport, due to the fact that thermal contact conductance is a function of the contact interfaces formed between particles. In spite of recent experimental and theoretical studies on the evolution of force chains, the formation of heat chains and the correlation between them still remain unclear. In this regard, a two-dimensional discrete model based on a particle mechanics approach is developed to unveil the characteristics of these microstructural arrangements, and the interactions between them under steady-state and equilibrium conditions. Thermally-assisted compaction of powders is a widely used manufacturing technique. Therefore, in this work, we model a two-dimensional configuration of randomly distributed spherical particles confined in a rigid die under mechanical and thermal loads. For this particular configuration, we study fundamental concepts such as formation of force and heat chains, evolution of force and heat distributions with respect to compaction parameters, and cross-property relation between normal force and heat transferred at the contact surfaces.


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