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The Riemann Problem for a Blood Flow Model in Arteries

The Riemann Problem for a Blood Flow Model in Arteries
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Year:    2020

Author:    Wancheng Sheng, Qinglong Zhang, Yuxi Zheng

Communications in Computational Physics, Vol. 27 (2020), Iss. 1 : pp. 227–250

Abstract

In this paper, the Riemann solutions of a reduced 6×6 blood flow model in medium-sized to large vessels are constructed. The model is non-strictly hyperbolic and non-conservative in nature, which brings two difficulties of the Riemann problem. One is the appearance of resonance while the other one is loss of uniqueness. The elementary waves include shock wave, rarefaction wave, contact discontinuity and stationary wave. The stationary wave is obtained by solving a steady equation. We construct the Riemann solutions especially when the steady equation has no solution for supersonic initial data. We also verify that the global entropy condition proposed by C.Dafermos can be used here to select the physical relevant solution. The Riemann solutions may contribute to the design of numerical schemes, which can apply to the complex blood flows.

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Journal Article Details

Publisher Name:    Global Science Press

Language:    English

DOI:    https://doi.org/10.4208/cicp.OA-2018-0220

Communications in Computational Physics, Vol. 27 (2020), Iss. 1 : pp. 227–250

Published online:    2020-01

AMS Subject Headings:    Global Science Press

Copyright:    COPYRIGHT: © Global Science Press

Pages:    24

Keywords:    Blood flow elementary waves Riemann problem non-uniqueness global entropy condition.

Author Details

Wancheng Sheng

Qinglong Zhang

Yuxi Zheng

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