数学物理学报(英文版) ›› 2023, Vol. 43 ›› Issue (2): 469-491.doi: 10.1007/s10473-023-0201-9

• •    下一篇

THE EXISTENCE OF GLOBAL SOLUTIONS FOR THE FULL NAVIER-STOKES-KORTEWEG SYSTEM OF VAN DER WAALS GAS

Hakho Hong   

  1. Institute of Mathematics, State Academy of Sciences, Pyongyang, Democratic Peoples Republic of Korea
  • 收稿日期:2020-12-15 修回日期:2022-02-21 出版日期:2023-03-25 发布日期:2023-04-12
  • 作者简介:Hakho HONG, E-mail: hhhong@star-co.net.kp; hhong@amss.ac.cn

THE EXISTENCE OF GLOBAL SOLUTIONS FOR THE FULL NAVIER-STOKES-KORTEWEG SYSTEM OF VAN DER WAALS GAS

Hakho Hong   

  1. Institute of Mathematics, State Academy of Sciences, Pyongyang, Democratic Peoples Republic of Korea
  • Received:2020-12-15 Revised:2022-02-21 Online:2023-03-25 Published:2023-04-12
  • About author:Hakho HONG, E-mail: hhhong@star-co.net.kp; hhong@amss.ac.cn

摘要: The aim of this work is to prove the existence for the global solution of a non-isothermal or non-isentropic model of capillary compressible fluids derived by J. E. Dunn and J. Serrin (1985), in the case of van der Waals gas. Under the small initial perturbation, the proof of the global existence is based on an elementary energy method using the continuation argument of local solution. Moreover, the uniqueness of global solutions and large time behavior of the density are given. It is one of the main difficulties that the pressure $p$ is not the increasing function of the density $\rho$.

关键词: Navier-Stokes-Korteweg system, van der Waals gas, existence, uniqueness

Abstract: The aim of this work is to prove the existence for the global solution of a non-isothermal or non-isentropic model of capillary compressible fluids derived by J. E. Dunn and J. Serrin (1985), in the case of van der Waals gas. Under the small initial perturbation, the proof of the global existence is based on an elementary energy method using the continuation argument of local solution. Moreover, the uniqueness of global solutions and large time behavior of the density are given. It is one of the main difficulties that the pressure $p$ is not the increasing function of the density $\rho$.

Key words: Navier-Stokes-Korteweg system, van der Waals gas, existence, uniqueness