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Quarterly of Applied Mathematics

Quarterly of Applied Mathematics

Online ISSN 1552-4485; Print ISSN 0033-569X

   
 
 

 

Dispersive shocks in diffusive-dispersive approximations of elasticity and quantum-hydrodynamics


Authors: Daria Bolbot, Dimitrios Mitsotakis and Athanasios E. Tzavaras
Journal: Quart. Appl. Math. 81 (2023), 455-481
MSC (2020): Primary 35L65, 35Q40, 74J40, 76N30
DOI: https://doi.org/10.1090/qam/1658
Published electronically: February 17, 2023
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Abstract: The aim is to assess the combined effect of diffusion and dispersion on shocks in the moderate dispersion regime. For a diffusive dispersive approximation of the equations of one-dimensional elasticity (or p-system), we study convergence of traveling waves to shocks. The problem is recast as a Hamiltonian system with small friction, and an analysis of the length of oscillations yields convergence in the moderate dispersion regime $\varepsilon , \delta \to 0$ with $\delta = o(\varepsilon )$, under hypotheses that the limiting shock is admissible according to the Liu E-condition and is not a contact discontinuity at either end state. A similar convergence result is proved for traveling waves of the quantum hydrodynamic system with artificial viscosity as well as for a viscous Peregrine-Boussinesq system where traveling waves model undular bores, in all cases in the moderate dispersion regime.


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Additional Information

Daria Bolbot
Affiliation: Computer, Electrical and Mathematical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
ORCID: 0000-0003-0531-2727
Email: daria.bolbot@kaust.edu.sa

Dimitrios Mitsotakis
Affiliation: School of Mathematics and Statistics, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand
MR Author ID: 810201
ORCID: 0000-0003-2700-6093
Email: dimitrios.mitsotakis@vuw.ac.nz

Athanasios E. Tzavaras
Affiliation: Computer, Electrical and Mathematical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
MR Author ID: 175625
ORCID: 0000-0002-1896-2270
Email: athanasios.tzavaras@kaust.edu.sa

Received by editor(s): December 27, 2022
Published electronically: February 17, 2023
Dedicated: To Constantine Dafermos, who keeps inspiring us, with friendship and admiration
Article copyright: © Copyright 2023 Brown University