Chinese Journal of Computational Physics ›› 2024, Vol. 41 ›› Issue (6): 732-745.DOI: 10.19596/j.cnki.1001-246x.8904

• Research Article • Previous Articles     Next Articles

Progress in Modeling Turbulent Mixing Inudced by Interfacial Instabilities for Engineering Applications

Mengjuan XIAO1,2(), Hansong XIE3, Yuanwei BIN4, Yousheng ZHANG1,2,3,*()   

  1. 1. Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
    2. National Key Laboratory of Computational Physics, Beijing 100088, China
    3. Center for Applied Physics and Technology, Peking University, Beijing 100871, China
    4. State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University, Beijing 100871, China
  • Received:2024-01-26 Online:2024-11-25 Published:2024-12-26
  • Contact: Yousheng ZHANG

Abstract:

Turbulent mixing induced by interfacial instabilities widely exists in various natural phenomena and engineering problems. Specifically, in typical engineering flows, involved turbulent mixing problems are usually triggered by intricate initial perturbations. This type of mixing problems often has various complexities such as coexistence of multiple mixing mechanisms, multi-stage continuous evolution, and wide and drastic changes in main control parameters. Accurately predicting the spatiotemporal evolution of mixing zone under the aforementioned complexity is crucial for engineering applications. In the current and foreseeable future, Reynolds-Averaged Navier-Stokes (RANS) and large eddy simulation (LES) modeling are the most feasible numerical methods. However, existing RANS and LES models face key challenges which must overcome, such as difficulty in uniformly predicting various mixing problems. This review will focus on these issues, standing from the perspective of engineering application, and provide a detailed overview of the latest understanding and existing problems of RANS and LES modeling among academic peers, as well as ours' recent progress.

Key words: interfacial instabilities, turbulent mixing, Reynolds-averaged Navier-stokes model, large eddy simulation model