数学物理学报(英文版) ›› 2024, Vol. 44 ›› Issue (5): 1801-1836.doi: 10.1007/s10473-024-0510-7

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EVOLUTION AND INTERACTION OF $\delta$-WAVES IN THE ZERO-PRESSURE GAS DYNAMICS SYSTEM*

Abhishek Das1,†, K. T. Joseph2   

  1. 1. Centre for Data Science, Institute of Technical Education and Research (ITER), Siksha 'O' Anusandhan (Deemed to be University), Bhubaneswar 751030, Odisha, India;
    2. Centre for Applicable Mathematics, Tata Institute of Fundamental Research Sharada~Nagar, Bangalore 560065, Karnataka, India
  • 收稿日期:2023-02-08 修回日期:2023-10-19 出版日期:2024-10-25 发布日期:2024-10-22
  • 通讯作者: †Abhishek Das , E-mail,: abhishekdas@soa.ac.in; ad16.1992@gmail.com
  • 作者简介:E-mail,: K. T. Joseph , ktj@tifrbng.res.inE-mail

EVOLUTION AND INTERACTION OF $\delta$-WAVES IN THE ZERO-PRESSURE GAS DYNAMICS SYSTEM*

Abhishek Das1,†, K. T. Joseph2   

  1. 1. Centre for Data Science, Institute of Technical Education and Research (ITER), Siksha 'O' Anusandhan (Deemed to be University), Bhubaneswar 751030, Odisha, India;
    2. Centre for Applicable Mathematics, Tata Institute of Fundamental Research Sharada~Nagar, Bangalore 560065, Karnataka, India
  • Received:2023-02-08 Revised:2023-10-19 Online:2024-10-25 Published:2024-10-22
  • Contact: †Abhishek Das , E-mail,: abhishekdas@soa.ac.in; ad16.1992@gmail.com
  • About author:E-mail,: K. T. Joseph , ktj@tifrbng.res.inE-mail

摘要: Evolution and interaction of plane waves of the multidimensional zero-pressure gas dynamics system leads to the study of the corresponding one dimensional system. In this paper, we study the initial value problem for one dimensional zero-pressure gas dynamics system. Here the first equation is the Burgers equation and the second one is the continuity equation. We consider the solution with initial data in the space of bounded Borel measures. First we prove a general existence result in the algebra of generalized functions of Colombeau. Then we study in detail special solutions with $\delta$-measures as initial data. We study interaction of waves originating from initial data concentrated on two point sources and interaction with classical shock/rarefaction waves. This gives an understanding of plane-wave interactions in the multidimensional case. We use the vanishing viscosity method in our analysis as this gives the physical solution.

关键词: zero-pressure gas dynamics, delta-waves, interaction of waves

Abstract: Evolution and interaction of plane waves of the multidimensional zero-pressure gas dynamics system leads to the study of the corresponding one dimensional system. In this paper, we study the initial value problem for one dimensional zero-pressure gas dynamics system. Here the first equation is the Burgers equation and the second one is the continuity equation. We consider the solution with initial data in the space of bounded Borel measures. First we prove a general existence result in the algebra of generalized functions of Colombeau. Then we study in detail special solutions with $\delta$-measures as initial data. We study interaction of waves originating from initial data concentrated on two point sources and interaction with classical shock/rarefaction waves. This gives an understanding of plane-wave interactions in the multidimensional case. We use the vanishing viscosity method in our analysis as this gives the physical solution.

Key words: zero-pressure gas dynamics, delta-waves, interaction of waves

中图分类号: 

  • 35F25