A Model Problem for Nematic-Isotropic Transitions with Highly Disparate Elastic Constants
A Model Problem for Nematic-Isotropic Transitions with Highly Disparate Elastic Constants
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具有高度不同弹性常数的向列相各向同性转变的模型问题
DOI:
10.1007/s00205-020-01501-x
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发表时间:
2020
影响因子:
2.5
通讯作者:
Venkatraman, Raghavendra
中科院分区:
文献类型:
--
作者:
Golovaty, Dmitry;Novack, Michael;Sternberg, Peter;Venkatraman, Raghavendra
Continuing the program initiated in Golovaty et al. (SIAM J Math Anal 51(1):276–320, 2018), we analyze a model problem based on highly disparate elastic constants that we propose in order to understand corners and cusps that form on the boundary between the nematic and isotropic phases in a liquid crystal. For a bounded planar domainwe investigate theasymptotics of the variational problem $$\begin{aligned} \inf \displaystyle \frac{1}{2}\int _\Omega \left( \frac{1}{\varepsilon } W(u)+\varepsilon |\nabla u|^2 + L_\varepsilon (\mathrm {div}\,u)^2 \right) \,\hbox {d}x \end{aligned}$$within various parameter regimes forHereandWis a potential vanishing on the unit circle and at the origin. When, we show that these functionals-converge to a constant multiple of the perimeter of the phase boundary and the divergence penalty is not felt. However, when, we find that a tangency requirement along the phase boundary for competitors in the conjectured-limit becomes a mechanism for development of singularities. We establish criticality conditions for this limit and under a non-degeneracy assumption on the potential we prove the compactness of energy bounded sequences in. The role played by this tangency condition on the formation of interfacial singularities is investigated through several examples: each of these examples involves analytically rigorous reasoning motivated by numerical experiments. We argue that generically, “wall” singularities between-valued states of the kind analyzed in Golovaty et al. (SIAM J Math Anal 51(1):276–320, 2018) are expected near the defects along the phase boundary.
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影响因子:
2.5
作者:
X. Lamy;A. Lorent;G. Peng
通讯作者:
G. Peng
影响因子:
1.4
作者:
A. Poliakovsky
通讯作者:
A. Poliakovsky
影响因子:
8.6
作者:
Joseph Rudnick;R. Bruinsma
通讯作者:
R. Bruinsma
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
A. Poliakovsky
通讯作者:
A. Poliakovsky
DOI:
10.1017/s030821050000113x
发表时间:
2001-01-01
影响因子:
1.3
作者:
DeSimone, A;Müller, S;Otto, F
通讯作者:
Otto, F