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Quarterly of Applied Mathematics

Quarterly of Applied Mathematics

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

   
 
 

 

Two-dimensional non-self-similar Riemann solutions for a thin film model of a perfectly soluble anti-surfactant solution


Authors: Rahul Barthwal and T. Raja Sekhar
Journal: Quart. Appl. Math. 80 (2022), 717-738
MSC (2020): Primary 35L65, 35L40; Secondary 35L67, 35L03, 74K35
DOI: https://doi.org/10.1090/qam/1625
Published electronically: May 26, 2022
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Abstract: In this article, we construct non-self-similar Riemann solutions for a two-dimensional quasilinear hyperbolic system of conservation laws which describes the fluid flow in a thin film for a perfectly soluble anti-surfactant solution. The initial Riemann data consists of two different constant states separated by a smooth curve in $x-y$ plane, so without using self-similarity transformation and dimension reduction, we establish solutions for five different cases. Further, we consider interaction of all possible nonlinear waves by taking initial discontinuity curve as a parabola to develop the structure of global entropy solutions explicitly.


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Additional Information

Rahul Barthwal
Affiliation: Department of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur, India
ORCID: 0000-0002-5245-072X
Email: rahulbarthwal@iitkgp.ac.in

T. Raja Sekhar
Affiliation: Department of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur, India
MR Author ID: 831418
ORCID: 0000-0002-4785-2134
Email: trajasekhar@maths.iitkgp.ac.in

Keywords: Thin film flow, Non-self-similar solution, Riemann problem, Hyperbolic conservation laws, Wave interactions
Received by editor(s): March 16, 2022
Received by editor(s) in revised form: April 17, 2022
Published electronically: May 26, 2022
Additional Notes: The first author was supported by University Grants Commission, Government of India (Ref. No. 1057/(CSIR UGC NET DEC. 2017)).
The second author was supported by SERB, DST, India (Ref. No. MTR/2019/001210).
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