The richtmyer-meshkov instability in a square cylinder under a transverse magnetic field
The Magnetohydrodynamic (MHD) equations are solved by using the CTU+CT algorithm which ensures the magnetic divergence free condition.By considering whether there exists a transverse magnetic field or not, the interaction between a planar shock wave and a square cylinder with SF6 gas inside the cylinder and air outside the cylinder are investigated.The hydrodynamic case (B =0 T) is in good agreement with the previous experiment.The results show that both the hydrodynamic and Magnetohydrodynamic case have the same wave structures such as refraction shock, transmission shock, reflection shock and diffraction shock.In the hydrodynamic case, the Richmyer-Meshkov instability and interface vortex sequences appear when the cylinder is impacted by the incident shock.However, in the presence of a transverse magnetic field, the Richmyer-Meshkov instability is compressed and the interface vortex sequences vanish.Furthermore, by comparing the density and vorticity field, it is shown that the baroclinic vorticity can be extracted from the interface in the presence of a magnetic field and thus the interface instability are compressed.
Richmyer-Meshkov instability Magnetohydrodynamic Shock waves
Guo-dan DONG Huan-hao ZHANG Jian-hua QIN Zhen-ya LIN Zhi-hua CHEN
Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, China
国际会议
2018 International Conference on Defence Technology (2018国际防务技术会议)
北京
英文
26-29
2018-10-21（万方平台首次上网日期，不代表论文的发表时间）