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In this paper, we proved the well-posedness theory of compressible subsonic jet flows for two-dimensional steady Euler system with {\it general} incoming horizontal velocity as long as the flux is larger than a critical value. One of the…

偏微分方程分析 · 数学 2024-02-23 Yan Li , Wenhui Shi , Lan Tang , Chunjing Xie

We establish the stability of 3-D axisymmetric transonic shock solutions of the steady full Euler system in divergent nozzles under small perturbations of an incoming radial supersonic flow and a constant pressure at the exit of the…

偏微分方程分析 · 数学 2021-02-26 Yong Park

A recent prominent result asserts that steady incompressible Euler flows strictly away from stagnation in a two-dimensional infinitely long strip must be shear flows. On the other hand, flows with stagnation points, very challenging in…

偏微分方程分析 · 数学 2023-12-12 Congming Li , Yingshu Lv , Henrik Shahgholian , Chunjing Xie

In this paper, the steady inviscid flows with radial symmetry for the isothermal Euler system are studied in an annulus. We present a complete classification of transonic radially symmetric flow patterns in term of physical boundary…

偏微分方程分析 · 数学 2023-10-20 Na Zhang

In this paper we present some classification results for the steady Euler equations in two-dimensional exterior domains with free boundaries. We prove that, in an exterior domain, if a steady Euler flow devoid of interior stagnation points…

偏微分方程分析 · 数学 2024-06-25 Daomin Cao , Boquan Fan , Weicheng Zhan

A compactness framework is established for approximate solutions to subsonic-sonic flows governed by the steady full Euler equations for compressible fluids in arbitrary dimension. The existing compactness frameworks for the two-dimensional…

偏微分方程分析 · 数学 2015-07-28 Gui-Qiang G. Chen , Fei-Min Huang , Tian-Yi Wang

In this paper, a compensated compactness framework is established for sonic-subsonic approximate solutions to the $n$-dimensional$(n\geq 2)$ Euler equations for steady irrotational flow that may contain stagnation points. This compactness…

偏微分方程分析 · 数学 2015-03-19 Feimin Huang , Tianyi Wang , Yong Wang

For a class of external forces, we prove the existence and uniqueness of smooth transonic flows to the one dimensional steady Euler system with an external force, which is subsonic at the inlet and flows out at supersonic speed after…

偏微分方程分析 · 数学 2024-03-26 Shangkun Weng , Yan Zhou

Given constant data of density $\rho_0$, velocity $-u_0{\bf e}_r$, pressure $p_0$ and electric force $-E_0{\bf e}_r$ for supersonic flow at the entrance, and constant pressure $p_{\rm ex}$ for subsonic flow at the exit, we prove that…

偏微分方程分析 · 数学 2017-03-01 Myoungjean Bae , Yong Park

In this paper, we study the initial-boundary value problem of compressible Euler equations with friction and heating that model the combined Fanno-Rayleigh flows through symmetric variable area nozzles, in particular, the case of…

偏微分方程分析 · 数学 2016-12-01 Shih-Wei Chou , John M. Hong , Bo-Chih Huang , Reyna Quita

We consider the motion of two inviscid, compressible, and electrically conducting fluids separated by an interface across which there is no fluid flow in the presence of surface tension. The magnetic field is supposed to be nowhere…

偏微分方程分析 · 数学 2022-02-25 Yuri Trakhinin , Tao Wang

We address a free boundary model for the compressible Euler equations where the free boundary, which is elastic, evolves according to a weakly damped fourth order hyperbolic equation forced by the fluid pressure. This system captures the…

偏微分方程分析 · 数学 2023-11-16 Igor Kukavica , Šárka Nečasová , Amjad Tuffaha

We consider the evolution of an incompressible two-dimensional perfect fluid as the boundary of its domain is deformed in a prescribed fashion. The flow is taken to be initially steady, and the boundary deformation is assumed to be slow…

偏微分方程分析 · 数学 2007-05-23 J. Vanneste , D. Wirosoetisno

This paper concerns the structural stability of smooth cylindrically symmetric transonic flows in a concentric cylinder. Both cylindrical and axi-symmetric perturbations are considered. The governing system here is of mixed…

偏微分方程分析 · 数学 2021-01-05 Shangkun Weng , Zhouping Xin , Hongwei Yuan

This paper concerns smooth supersonic flows with Lipschitz continuous speed in two-dimensional infinite expanding nozzles, which are governed by a quasilinear hyperbolic equation being singular at the sonic and vacuum state. The flow…

偏微分方程分析 · 数学 2014-10-16 Chunpeng Wang , Zhouping Xin

We establish the existence and uniqueness of some smooth accelerating transonic flows governed by the three dimensional steady compressible Euler equations with an external force in cylinders with arbitrary cross sections, which include…

偏微分方程分析 · 数学 2024-11-08 Shangkun Weng , Zhouping Xin

We establish the existence and stability of cylindrical transonic shock solutions under three dimensional perturbations of the incoming flows and the exit pressure without any further restrictions on the background transonic shock…

偏微分方程分析 · 数学 2024-01-23 Shangkun Weng , Zhouping Xin

The unsteady response of nozzles with steady heat transfer forced by acoustic and/or entropy waves is modelled. The approach is based on the quasi-one-dimensional linearised Euler equations. The equations are cast in terms of three…

流体动力学 · 物理学 2022-03-02 Saikumar R. Yeddula , Juan Guzmán-Iñigo , Aimee S. Morgans

We formulated a problem on hypersonic limit of two-dimensional steady non-isentropic compressible Euler flows passing a straight wedge. It turns out that Mach number of the upcoming uniform supersonic flow increases to infinite may be taken…

偏微分方程分析 · 数学 2019-04-09 Aifang Qu , Hairong Yuan , Qin Zhao

We study a free boundary problem which is motivated by a particular case of the flow of a non-Newtonian fluid, with a pressure depending yield stress given by a Drucker-Prager plasticity criterion. We focus on the steady case and…

偏微分方程分析 · 数学 2017-01-19 Eleftherios Ntovoris , M Regis