The Cartesian vector solutions for the N-dimensional compressible Euler equations

Hongli AN, Engui FAN, Man Wai YUEN

Research output: Contribution to journalArticles

7 Citations (Scopus)

Abstract

In this paper, based on matrix and curve integration theory, we theoretically show the existence of Cartesian vector solutions u = b(t) + A(t)x for the general N-dimensional compressible Euler equations. Such solutions are global and can be explicitly expressed by an appropriate formulae. One merit of this approach is to transform analytically solving the Euler equations into algebraically constructing an appropriate matrix A(t). Once the required matrix A(t) is chosen, the solution u is directly obtained. Especially, we find an important solvable relation in ƴ = 1 + 2 / N between the dimension of equations and pressure parameter, which avoid additional independent constraints on the dimension N in existing literatures. Special cases of our results also include some interesting conclusions: (1) If the velocity field u is a linear transformation on x ϵ Rᴺ, then the pressure p is a relevant quadratic form. (2) The compressible Euler equations admit the Cartesian solutions if A(t) is an antisymmetric matrix. (3) The pressure p possesses radial symmetric form if A(t) is an antisymmetrically orthogonal matrix. Copyright © 2014 Wiley Periodicals, Inc.
Original languageEnglish
Pages (from-to)101-119
JournalStudies in Applied Mathematics
Volume134
Issue number1
Early online dateSep 2014
DOIs
Publication statusPublished - 2015

Citation

An, H., Fan, E., & Yuen, M. (2015). The Cartesian vector solutions for the N-dimensional compressible Euler equations. Studies in Applied Mathematics, 134(1), 101-119.

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