| Original Articles |
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An Effective Medium Approximation of Nonlinear Composites
with Spherical Particle |
| WEI En-Bo;GU Guo-Qing |
| College of Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093
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| Cite this article: |
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WEI En-Bo, GU Guo-Qing 2001 Chin. Phys. Lett. 18 960-962 |
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Abstract We have proposed a nonlinear effective medium approximation (EMA) method to estimate the bulk effective conductivities of weakly nonlinear composite media, which obey a current-field relation of the form J = σE+ X|E|2 E. As an example in three dimensions, we apply the EMA method to deal with a spherical inclusion in a host and derive the approximate analytic formulas of nonlinear effective response, which are suitable for the larger volume fraction of spherical inclusion. From our results, we can exactly obtain the generalized Landau formulas in the dilute limit.
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| Keywords:
72.20.Ht
72.60.+g
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Published: 01 July 2001
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| PACS: |
72.20.Ht
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(High-field and nonlinear effects)
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72.60.+g
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(Mixed conductivity and conductivity transitions)
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