Abstract
In the classical theory of acoustic waves, Blackstock’s model was proposed in 1963 to characterize the propagation of sound in thermoviscous fluids. In this paper, we investigate large-time asymptotic behaviors of the linear Cauchy problem for general Blackstock’s model (that is, without Becker’s assumption on monatomic perfect gases). We derive first and second asymptotic profiles of solution as \(t\gg 1\) by applying refined WKB analysis and Fourier analysis. Our results not only improve optimal estimates in Chen et al. (Indiana Univ Math J 72(2), 2023) for lower dimensional cases, but also illustrate the optimal leading term and novel second profiles of solution with additional weighted \(L^1\) data.
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Acknowledgements
The first author (Wenhui Chen) was partially supported by the National Natural Science Foundation of China under Grant No. 12171317, and Guangdong Basic and Applied Basic Research Foundation No. 2023A1515012044. The second author (Hirhoshi Takeda) is supported in part by the Grant-in-Aid for Scientific Research (C), No. 19K03596, from Japan Society for the Promotion of Science. The authors thank Ryo Ikehata (Hiroshima University) and Ya-guang Wang (Shanghai Jiao Tong University) for the suggestions in the preparation of the paper. The authors thank the anonymous referees for carefully reading the paper and giving some useful suggestions.
Funding
The first author (Wenhui Chen) was partially supported by the National Natural Science Foundation of China under Grant No. 12171317, and Guangdong Basic and Applied Basic Research Foundation No. 2023A1515012044. The second author (Hirhoshi Takeda) is supported in part by the Grant-in-Aid for Scientific Research (C), No. 19K03596, from Japan Society for the Promotion of Science.
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WC wrote the main manuscript test; WC and HT did the computations of all the paper; All authors reviewed the manuscript.
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Chen, W., Takeda, H. Large-Time Asymptotic Behaviors for Linear Blackstock’s Model of Thermoviscous Flow. Appl Math Optim 88, 21 (2023). https://doi.org/10.1007/s00245-023-10003-7
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DOI: https://doi.org/10.1007/s00245-023-10003-7
Keywords
- Acoustic waves
- Blackstock’s model
- Cauchy problem
- Optimal estimates
- Asymptotic profiles
- Optimal leading term