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arXiv 2006.10397math.APphysics.flu-dyn
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有棱区域中具有非零涡量的定常三维理想流

Steady three-dimensional ideal flows with nonvanishing vorticity in domains with edges

Douglas Svensson Seth

摘要:

本文证明了在具有非光滑边界的区域上定常Euler方程解的存在性结果。这是Alber(1992)在光滑域上的一个存在性结果的推广.我们考虑的区域有一个由三部分组成的边界,一部分是流体流入区域的地方,一部分是流体流出的地方,还有一部分是没有流体通过的地方。这三部分成直角相交。一个这样的例子是一个正圆柱体,流体从一端流入,从另一端流出,没有流体穿过地幔。证明的很大一部分致力于研究泊松方程和相关的相容性条件所需的可解性在这类区域。

英文摘要:

We prove an existence result for solutions to the stationary Euler equations in a domain with nonsmooth boundary. This is an extension of a previous existence result in smooth domains by Alber (1992). The domains we consider have a boundary consisting of three parts, one where fluid flows into the domain, one where the fluid flows out, and one which no fluid passes through. These three parts meet at right angles. An example of this would be a right cylinder with fluid flowing in at one end and out at the other, with no fluid going through the mantle. A large part of the proof is dedicated to studying the Poisson equation and the related compatibility conditions required for solvability in this kind of domain.

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