Singular Thermal Relaxation Limit for the Moore-Gibson-Thompson Equation Arising in Propagation of Acoustic Waves
Singular Thermal Relaxation Limit for the Moore-Gibson-Thompson Equation Arising in Propagation of Acoustic Waves
复制标题
声波传播中摩尔-吉布森-汤普森方程的奇异热弛豫极限
DOI:
10.1007/978-3-030-46079-2_9
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Lasiecka, Irena
中科院分区:
文献类型:
--
作者:
Bongarti, Marcelo;Charoenphon, Sutthirut;Lasiecka, Irena
Moore-Gibson-Thompson (MGT) equations, which describe acoustic waves in a heterogeneous medium, are considered. These are the third order in time evolutions of a predominantly hyperbolic type. MGT models account for a finite speed propagation due to the appearance of thermal relaxation coefficientin front of the third order time derivative. Since the values ofare relatively small and often negligible, it is important to understand the asymptotic behavior and characteristics of the model when. This is a particularly delicate issue since thedynamics is governed by a generator which is singular asIt turns out that the limit dynamics corresponds to the linearized Westervelt equation which is of a parabolic type. In this paper, we provide a rigorous analysis of the asymptotics which includes strong convergence of the corresponding evolutions over infinite horizon. This is obtained by studying convergence rates along with the uniform exponential stability of the third order evolutions. Spectral analysis for the MGT-equation along with a discussion of spectral uppersemicontinuity for both equations (MGT and linearized Westervelt) will also be provided.
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DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
B. Kaltenbacher;I. Lasiecka
通讯作者:
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影响因子:
1.4
作者:
I. Lasiecka
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I. Lasiecka
影响因子:
2.4
作者:
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通讯作者:
Wang, Xiaojun
影响因子:
2.4
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通讯作者:
Pata, Vittorino
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
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通讯作者:
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