具有涡度的二维可压缩亚音速喷流的自由边界凸度

IF 2.9 2区数学 Q1 MATHEMATICS, APPLIED

Applied Mathematics Letters Pub Date : 2024-09-07 DOI:10.1016/j.aml.2024.109303

Xin Wang

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引用次数: 0

摘要

在李玉等人的最新研究（[1], 2024）中，建立了具有一般涡度的二维可压缩亚声速射流的存在性和唯一性。作为后续研究，我们将研究可压缩亚音速旋转射流自由边界的几何形状。研究证明，如果喷嘴凹向流体，则射流的自由边界严格凸向流体。此外，还得到了流体区域水平速度的正值。

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Convexity of the free boundary for two-dimensional compressible subsonic jet flow with vorticity

In the recent work ([1], 2024) by Y. Li et al., the existence and uniqueness of the two-dimensional compressible subsonic jet flow with general vorticity were established. As a follow-up research, we will investigate the geometry shape of the free boundary for the compressible subsonic rotational jet flow. It is proved that if the nozzle is concave to the fluid, then the free boundary for the jet flow is strictly convex to the fluid. Furthermore, the positivity of the horizontal velocity in the fluid region is also obtained.

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来源期刊

Applied Mathematics Letters 数学-应用数学

CiteScore

7.70

自引率

5.40%

发文量

347

审稿时长

10 days

期刊介绍： The purpose of Applied Mathematics Letters is to provide a means of rapid publication for important but brief applied mathematical papers. The brief descriptions of any work involving a novel application or utilization of mathematics, or a development in the methodology of applied mathematics is a potential contribution for this journal. This journal''s focus is on applied mathematics topics based on differential equations and linear algebra. Priority will be given to submissions that are likely to appeal to a wide audience.