BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Xiaozhe Hu (Tufts University) DTSTART:20200729T150000Z DTEND:20200729T160000Z DTSTAMP:20260423T005821Z UID:GSMMA/13 DESCRIPTION:Title: R obust Preconditioners for Mixed-dimemsional Models of Flow in Fractured Po rous Media\nby Xiaozhe Hu (Tufts University) as part of Global Seminar on Mathematical Modeling and Applications\n\n\nAbstract\nMixed-dimensiona l partial differential equations arise in many physical applications inclu ding flow in fractured porous media\, where the fractures and their inters ections form a hierarchy of lower-dimensional submanifolds. An essential c omponent\, and usually the most time-consuming part of simulating PDEs\, i s solving the large-scale and ill-conditioned linear systems of equations arising from discretizations. In this work\, we generalize the traditional framework of designing preconditioners for the saddle point systems and d evelop effective preconditioners that are robust with respect to the physi cal and discretization parameters for mixed-dimensional models for flow in fractured porous media. Preliminary numerical experiments are presented t o support the theory and demonstrate the robustness of our preconditioners . This is joint work with Wietse Boon (KTH) and Ana Budisa (Simula)\n\nMe eting ID: 970 1588 0121\nPasscode: 614469\n LOCATION:https://researchseminars.org/talk/GSMMA/13/ END:VEVENT END:VCALENDAR