Robustness of finite element simulations in densely packed random particle composites
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Received:
01 July 2011
Revised:
01 October 2011
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Primary: 35B65, 65N15; Secondary: 65N30, 74Q20.
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This paper presents some weighted $H^2$-regularity estimates for a model Poisson problem with discontinuous coefficient at high contrast. The coefficient represents a random particle reinforced composite material, i.e., perfectly conducting circular particles are randomly distributed in some background material with low conductivity. Based on these regularity results we study the percolation of thermal conductivity of the material as the volume fraction of the particles is close to the jammed state. We prove that the characteristic percolation behavior of the material is well captured by standard conforming finite element models.
Citation: Daniel Peterseim. Robustness of finite element simulations in densely packed random particle composites[J]. Networks and Heterogeneous Media, 2012, 7(1): 113-126. doi: 10.3934/nhm.2012.7.113
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Abstract
This paper presents some weighted $H^2$-regularity estimates for a model Poisson problem with discontinuous coefficient at high contrast. The coefficient represents a random particle reinforced composite material, i.e., perfectly conducting circular particles are randomly distributed in some background material with low conductivity. Based on these regularity results we study the percolation of thermal conductivity of the material as the volume fraction of the particles is close to the jammed state. We prove that the characteristic percolation behavior of the material is well captured by standard conforming finite element models.
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