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Physics based models for metal hydride particle morphology, distribution, and effective thermal conductivity

Published online by Cambridge University Press:  31 January 2011

Kyle Christopher Smith  and
Timothy Fisher
Kyle Christopher Smith
Affiliation:
kcsmith@purdue.edu, Purdue University, Mechanical Engineering, West Lafayette, Indiana, United States
Timothy Fisher
Affiliation:
tsfisher@purdue.edu, Purdue University, Mechanical Engineering, West Lafayette, Indiana, United States
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Abstract

This paper describes a modeling approach to target aspects of heat conduction in metal hydride powders that are essential to metal hydrides as viable H2 storage media, including particle morphology distribution, size distribution, particle packing properties at specified solid fraction, and effective thermal conductivity. An isotropic fracture model is presented that replicates features of particle size and shape distributions observed experimentally. The discrete element method is used to simulate evolution of metal hydride particle contact networks during quasi-static consolidation of decrepitated metal hydride powders. Finally, the effective thermal conductivity of such a powder is modeled assuming that contact conductance is the same for each interparticle contact.

Keywords

energy storagepowder processingthermal conductivity
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1172: Symposium T – Nanoscale Heat Transport–From Fundamentals to Devices , 2009 , 1172-T09-05
Copyright
Copyright © Materials Research Society 2009

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