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BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Canal UGR - ECPv6.15.5//NONSGML v1.0//EN CALSCALE:GREGORIAN METHOD:PUBLISH X-ORIGINAL-URL:https://canalugr.si2.dev X-WR-CALDESC:Eventos para Canal UGR REFRESH-INTERVAL;VALUE=DURATION:PT1H X-Robots-Tag:noindex X-PUBLISHED-TTL:PT1H BEGIN:VTIMEZONE TZID:Europe/Madrid BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20220327T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20221030T010000 END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTART;TZID=Europe/Madrid:20220603T090000 DTEND;TZID=Europe/Madrid:20220603T170000 DTSTAMP:20260623T144852 CREATED:20220525T122449Z LAST-MODIFIED:20220525T122449Z UID:388411-1654246800-1654275600@canalugr.si2.dev SUMMARY:Seminario: "Compressible flow initiated by a characteristic function" DESCRIPTION:Seminario de ecuaciones\, impartido por Piotr B. Mucha (University of Warsaw). \nAbstract: We address a question concerning a motion of the perfect gas in the regime of two dimensional compressible Navier-Stokes system. We show the following fact:\nA flow initiated by an arbitrary velocity vector field (possibly large in H1) and an initial density given as a characteristic function of a measurable set exists uniquely\, globally in time\, provided that the bulk/volume viscosity is large enough. \nA key point of our analysis is the regularity of the density. Its features allow us to call it ripped\, since it can be rough – just bounded\, and vacuum may persist on merely measurable sets. The result is based on the so-called shift regularity technique and analysis of solutions with respect to streamlines. The main results give brand new information concerning regularity of solutions for general pressure laws. As an added value of our considerations we obtain rigorous justification of passing from the compressible Navier-Stokes system to the the inhomogeneous incompressible one\, even for densities with vacuum. \n\n\nFecha: Viernes 3 de junio de 2022\nLugar: Sala de Conferencias Fisymat.\nHorario: 9:00 h\nOrganiza: Instituto de Matemáticas UGR – IMAG\nMás información:\nimag@ugr.es\nhttps://twitter.com/IMAG_UGR URL:https://canalugr.si2.dev/evento/seminario-compressible-flow-initiated-by-a-characteristic-function/ LOCATION:Facultad de Ciencias\, Campus Universitario de Fuentenueva\, Granada\, Granada\, 18071\, España CATEGORIES:Conferencias, seminarios, divulgación científica ATTACH;FMTTYPE=image/png:https://canalugr.si2.dev/wp-content/uploads/2021/04/instituto-matematicas.png GEO:37.1838696;-3.6056272 X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Facultad de Ciencias Campus Universitario de Fuentenueva Granada Granada 18071 España;X-APPLE-RADIUS=500;X-TITLE=Campus Universitario de Fuentenueva:geo:-3.6056272,37.1838696 END:VEVENT END:VCALENDAR