TY - JOUR T1 - A Review on Two Types of Sonic Interfaces AU - Bae , Myoungjean JO - Communications in Mathematical Analysis and Applications VL - 3 SP - 384 EP - 401 PY - 2024 DA - 2024/09 SN - 3 DO - http://doi.org/10.4208/cmaa.2024-0016 UR - https://global-sci.org/intro/article_detail/cmaa/23381.html KW - Keldysh type, transonic, sonic interface,weak discontinuity, regular interface. AB -

In this paper, two examples of sonic interfaces ([2–6]) are presented. The first example shows the case of sonic interfaces as weak discontinuities in self-similar shock configurations of unsteady Euler system. The second example shows the case of sonic interfaces as regular interfaces in accelerating transonic flows governed by the steady Euler-Poisson system with self-generated electric forces. And, we discuss analytic differences of the two examples, and introduce an open problem on decelerating transonic solution to the steady Euler-Poisson system.