Chinese Journal of Computational Physics ›› 2023, Vol. 40 ›› Issue (2): 159-168.DOI: 10.19596/j.cnki.1001-246x.8602

Special Issue: 贺贤土院士从事科学研究工作60周年暨激光聚变相关研究进展专刊

• The 60th Anniversary of Academician He Xiantu's Scientific Research Work: A Special Issue of Research Progress in Laser Fusion • Previous Articles     Next Articles

Hybrid Fluid-PIC Modeling and Its Application in Laser Fusion

Hongbo CAI1,2(), Yupei XU3, Peilin YAO4, Enhao ZHANG3, Hanxiao HUANG5, Shaoping ZHU1,3, Xiantu HE1,2   

  1. 1. Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
    2. Center for Applied Physics and Technology, and College of Engineering, Peking University, Beijing 100871, China
    3. Graduate School, China Academy of Engineering Physics, Beijing 100088, China
    4. Department of Engineering Physics, Tsinghua University, Beijing 100084, China
    5. Center for Applied Physics and Technology, School of Physics and College of Engineering, Peking University, Beijing 100871, China
  • Received:2022-07-29 Online:2023-03-25 Published:2023-07-05

Abstract:

The influence of plasma effect on the shock wave and hydrodynamic instabilities is a widely concerned problem in the current research of laser fusion. However, due to the limitations of the numerical simulation methods, there is still a lack of research tools on this issue. In this work, a hybrid fluid PIC(particle-in-cell) simulation method is established tentatively. Electrons are described by a massless fluid, and multi-component ions are described by PIC method; The fluid motion is obtained by solving the equations of electro-magnetohydrodynamic, and the electromagnetic fields are obtained by solving Ohm's law and Faraday's law. Aiming at the plasma condition of laser fusion, we use hybrid fluid-PIC simulation to study the shock wave structure and its characteristics in high energy density conditions, and the influence of plasma effect on the evolution of hydrodynamic instabilities. Hybrid fluid-PIC physical modeling provides a new research method for studying the effect of plasma effect on shock wave and hydrodynamic instabilities under high energy density.

Key words: laser fusion, hybrid fluid-particle-in-cell modeling, shock wave, hydrodynamic instability