平滑度
涡流
欧拉方程
涡度
不可压缩流
欧拉公式
偏微分方程
矢量场
流量(数学)
数学分析
数学
动作(物理)
傅里叶变换
边界(拓扑)
涡流片
物理
牙石(牙科)
几何学
热力学
医学
量子力学
牙科
出处
期刊:Oxford University Press eBooks
[Oxford University Press]
日期:1998-09-10
被引量:159
标识
DOI:10.1093/oso/9780198503972.001.0001
摘要
Abstract The aim of this book is to offer a direct and self-contained access to some of the new or recent results in fluid mechanics. It gives an authoritative account on the theory of the Euler equations describing a perfect incompressible fluid. First of all, the text derives the Euler equations from a variational principle, and recalls the relations on vorticity and pressure. Various weak formulations are proposed. The book then presents the tools of analysis necessary for their study: Littlewood-Paley theory, action of Fourier multipliers on L spaces, and partial differential calculus. These techniques are then used to prove various recent results concerning vortext patches or sheets, essentially the persistence of the smoothness of the boundary of a vortex patch, even if that smoothness allows singular points, as well as the existence of weak solutions of the vorticity sheet type. The text also presents properties of microlocal (analytic or Gevrey) regularity of the solutions of Euler equations, and provides links of such properties to the smoothness in time of the flow of the solution vector field.
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