Acta mathematica scientia,Series A ›› 2025, Vol. 45 ›› Issue (2): 371-388.

Previous Articles     Next Articles

The Vanishing Pressure Limit of Riemann Solutions for a Class of Two-Phase Flow Models with Non-Isentropic Dusty Gases

Daiguang Jin,Shaohong He(),Yuyan Wu,Weifeng Jiang*()   

  1. Faculty of Science, China Jiliang University, Hangzhou 310018
  • Received:2024-11-05 Revised:2025-01-26 Online:2025-04-26 Published:2025-04-09
  • Contact: Weifeng Jiang E-mail:s22080701004@cjlu.edu.cn;casujiang89@cjlu.edu.cn
  • Supported by:
    NSFC(1240012056)

Abstract:

This paper studies the cavitation and concentration phenomena of the Riemann solutions for a reduced two-phase mixtures model with non-isentropic dusty gas state as the pressure vanishes. Firstly, we construct the Riemann entropy solutions by characteristic analysis method in (p,u,s) coordinate system. Secondly, we conclude that, the pressureless limit of Riemann solutions for the reduced two-phase mixtures model is just the Riemann solutions for the reduced 2-dimensional pressureless gas dynamics model. Finally, we present numerical simulations which are consistent with our theoretical analysis.

Key words: non-isentropic, two-phase mixtures model, pressureless limit, Riemann problem, Delta shock wave, vacuum state

CLC Number: 

  • O175.23
Trendmd