Subsonic solutions to a shock diffraction problem by a convex cornered wedge for the pressure gradient system
Subsonic solutions to a shock diffraction problem by a convex cornered wedge for the pressure gradient system
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压力梯度系统中凸角楔块对冲击衍射问题的亚音速解决方案
DOI:
10.3934/cpaa.2020217
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Kyungwoo Song
中科院分区:
文献类型:
--
作者:
Yinzheng Sun;Qin Wang;Kyungwoo Song
We establish the global existence of subsonic solutions to a two dimensional Riemann problem governed by a self-similar pressure gradient system for shock diffraction by a convex cornered wedge. Since the boundary of the subsonic region consists of a transonic shock and a part of a sonic circle, the governing equation becomes a free boundary problem for nonlinear degenerate elliptic equation of second order with a degenerate oblique derivative boundary condition. We also obtain the optimal \begin{document}$ C^{0,1} $\end{document} -regularity of the solutions across the degenerate sonic boundary.
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