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Quarterly of Applied Mathematics

Quarterly of Applied Mathematics

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

   
 
 

 

Partial dissipation and sub-shock


Author: Tai-Ping Liu
Journal: Quart. Appl. Math. 81 (2023), 483-506
MSC (2020): Primary 35L65, 35L67; Secondary 76N10
DOI: https://doi.org/10.1090/qam/1657
Published electronically: March 6, 2023
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Abstract: To study the dissipation property of a physical system one first considers infinitesimal waves for the analysis of weakly nonlinear phenomena. For some physical systems, the dissipation is partial and there is the appearance of sub-shocks in a strong traveling trajectory. The phenomenon of partial dissipation can occur for systems of hyperbolic balance laws and also for viscous conservation laws in continuum physics. We illustrate the phenomenon for a simple relaxation model and for the Navier-Stokes equations for compressible media. The admissibility criteria and the formation of sub-shocks are studied through the zero viscosity limit.


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Additional Information

Tai-Ping Liu
Affiliation: Institute of Mathematics, Academia Sinica, Taipei, Taiwan, 10617 and Department of Mathematics, Stanford University, Stanford, CA 94305
MR Author ID: 197926

Keywords: Sub-shocks, dissipation, viscous profiles, compressible Navier-Stokes equations, relaxation model
Received by editor(s): December 28, 2022
Published electronically: March 6, 2023
Additional Notes: The research was supported by MOST Grant 106-2115-M-001-011-
Dedicated: Dedicated to Constantine Dafermos on the occasion of his 80th birthday, in appreciation of Costas’s warm support to the conservation laws community over the years
Article copyright: © Copyright 2023 Brown University