arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1901.09736math.AP
收藏

多维可压缩等熵欧拉方程的球对称解

Spherically symmetric solutions of the multi-dimensional, compressible, isentropic Euler equations

Matthew R. I. Schrecker

摘要:

本文证明了文献[2,3]中球对称Euler方程的解是多维可压缩Euler方程的弱解。这是根据对直到原点的人工粘性近似值所作的新的统一估计得出的,消除了以前对容许检验函数的限制,并排除了在原点形成人工边界层的可能性。对于球对称流,关于原点处密度和速度的可能爆破率,均匀估计可能是独立的。

英文摘要:

In this note, we prove that the solutions obtained to the spherically symmetric Euler equations in the recent works [2, 3] are weak solutions of the multi-dimensional compressible Euler equations. This follows from new uniform estimates made on the artificial viscosity approximations up to the origin, removing previous restrictions on the admissible test functions and ruling out formation of an artificial boundary layer at the origin. The uniform estimates may be of independent interest as concerns the possible rate of blow-up of the density and velocity at the origin for spherically symmetric flows.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑