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Medientyp:
E-Artikel
Titel:
Spherically symmetric solutions of the multidimensional, compressible, isentropic Euler equations
Beteiligte:
Schrecker, Matthew
Erschienen:
American Mathematical Society (AMS), 2019
Erschienen in:Transactions of the American Mathematical Society
Sprache:
Englisch
DOI:
10.1090/tran/7980
ISSN:
0002-9947;
1088-6850
Entstehung:
Anmerkungen:
Beschreibung:
<p>In this paper, we prove the existence of finite-energy weak solutions to the compressible, isentropic Euler equations given arbitrary spherically symmetric initial data of finite energy. In particular, we show that the solutions to the spherically symmetric Euler equations obtained in recent works by Chen and Perepelitsa and Chen and Schrecker are weak solutions of the multidimensional, compressible Euler equations. This follows from new uniform estimates made on artificial viscosity approximations up to the origin, removing previous restrictions on admissible test functions and ruling out formation of an artificial boundary layer at the origin. The uniform estimates may be of independent interest concerning the possible rate of blowup of density and velocity at the origin for spherically symmetric flows.</p>