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arXiv 1105.4328math.AP
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具有极端电导率夹杂的电导率方程解的渐近性与计算

Asymptotics and Computation of the Solution to the Conductivity Equation in the Presence of Adjacent Inclusions with Extreme Conductivities

Hyeonbae Kang, Mikyoung Lim, KiHyun Yun

摘要:

当极端导电性的夹杂物(绝缘体或理想导体)位置很近时,电导率方程的解的梯度可以任意大。梯度的计算是非常具有挑战性的,因为它的性质在一个狭窄的区域之间的夹杂物爆破。本文明确地刻画了两个具有极端电导率的圆形夹杂相邻时解的奇异项。此外,我们通过数值计算表明,奇异项的特征可以有效地用于计算的梯度存在相邻的夹杂物。

英文摘要:

When inclusions with extreme conductivity (insulator or perfect conductor) are closely located, the gradient of the solution to the conductivity equation can be arbitrarily large. And computation of the gradient is extremely challenging due to its nature of blow-up in a narrow region in between inclusions. In this paper we characterize explicitly the singular term of the solution when two circular inclusions with extreme conductivities are adjacent. Moreover, we show through numerical computations that the characterization of the singular term can be used efficiently for computation of the gradient in the presence adjacent inclusions.

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