Exploring the Atwood number impact on shock-driven hydrodynamic instability at pentagonal interface using discontinuous Galerkin simulations

• DOI: 10.1016/j.physd.2024.134276
• Publication Date: 2024-06-28T18:16:58Z
• Authors: Sham Bansal; Ashok Kumar; Akshay Saini; Anup Singh Negi; Satyvir Singh
• Keywords: Classification of discontinuities

Investigation of Atwood number impact is crucial for comprehending the flow dynamics evolving hydrodynamic instability. In this paper, impacts on shock-driven instability at a backward-facing pentagonal interface in its early stages are explored numerically. The has unique property which incident angle shock wave constant along edge. This provides ideal environment shock-refraction process. To examine impact, we consider five distinct gases, including sulfur hexafluoride, krypton, argon, neon, and helium, filled inside surrounded by nitrogen gas. A mixed modal discontinuous Galerkin method used to solve two-dimensional Navier–Stokes–Fourier equations two-component gas flows numerical simulations. simulation results illustrate that plays role fields shocked-pentagonal interface, have not been reported literature. greatly impacted number, leading complex patterns, focusing, jet formation, deformation, vorticity generation. Further, effects also thoroughly examined quantitative study based integral quantities features. Finally, analysis performed intrinsic differences between evolution square interfaces.