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Quarterly of Applied Mathematics

Quarterly of Applied Mathematics

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

   
 
 

 

The Riemann problem for a weakly hyperbolic two-phase flow model of a dispersed phase in a carrier fluid


Authors: Maren Hantke, Christoph Matern, Vincent Ssemaganda and Gerald Warnecke
Journal: Quart. Appl. Math. 78 (2020), 431-467
MSC (2010): Primary 35L65, 76T10, 76T15
DOI: https://doi.org/10.1090/qam/1556
Published electronically: November 19, 2019
MathSciNet review: 4100288
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Abstract: We consider Riemann problems for a two-phase isothermal flow model of a dispersed phase in a compressible carrier phase. It is a weakly hyperbolic system of conservative partial differential equations. This model is the conservation part of a more complete physical model involving phase transitions in case both phases are of the same material. The purpose of this paper is to better understand the mathematical properties of the simplified model. We investigate the characteristic structure of the Riemann problems and construct their exact solutions. Solutions may contain delta shocks or vaporless states. We give examples for initial data corresponding to a system of water bubbles dispersed in liquid water. The analysis is complicated considerably by the fact that a liquid such as water requires an affine equation of state.


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Additional Information

Maren Hantke
Affiliation: Institute of Mathematics, Martin Luther University Halle-Wittenberg, Theodor-Lieser-Str. 5, D-06120 Halle (Saale), Germany
MR Author ID: 822591
Email: maren.hantke@mathematik.uni-halle.de

Christoph Matern
Affiliation: Institute for Analysis and Numerics, Otto-von-Guericke University Magdeburg, Universitätsplatz 2, D-39106 Magdeburg, Germany
Email: christoph.matern@ovgu.de

Vincent Ssemaganda
Affiliation: Institute for Analysis and Numerics, Otto-von-Guericke University Magdeburg, Universitätsplatz 2, D-39106 Magdeburg, Germany
Address at time of publication: Toyota Motor Corporation Australia, 155 Bertie Street, Port Melbourne VIC 3207 Australia
MR Author ID: 952383
Email: vincentssemaganda@yahoo.com

Gerald Warnecke
Affiliation: Institute for Analysis and Numerics, Otto-von-Guericke University Magdeburg, Universitätsplatz 2, D-39106 Magdeburg, Germany
MR Author ID: 261694
Email: gerald.warnecke@ovgu.de

Received by editor(s): June 7, 2019
Received by editor(s) in revised form: July 2, 2019
Published electronically: November 19, 2019
Additional Notes: This work was supported by the German Research Foundation (DFG) Research Training Group 1554/2: Micro-Macro-Interactions of structured Media and Particle Systems
Article copyright: © Copyright 2019 Brown University