{"id":4785,"date":"2020-02-04T08:44:43","date_gmt":"2020-02-04T07:44:43","guid":{"rendered":"https:\/\/www.mi.uni-koeln.de\/NumSim\/?p=4785"},"modified":"2020-02-06T09:21:25","modified_gmt":"2020-02-06T08:21:25","slug":"upcoming-talk-lea-miko-versbach-lund-university-sweden-implicit-dg-solvers-and-multigrid-preconditioners-05-02-2020-11am","status":"publish","type":"post","link":"https:\/\/www.mi.uni-koeln.de\/NumSim\/2020\/02\/04\/upcoming-talk-lea-miko-versbach-lund-university-sweden-implicit-dg-solvers-and-multigrid-preconditioners-05-02-2020-11am\/","title":{"rendered":"Talk: Lea Miko Versbach, Lund University, Sweden, &#8220;Implicit DG solvers and multigrid preconditioners&#8221; [05.02.2020, 11am]"},"content":{"rendered":"<p><strong>On Wednesday, 5 February 2020 at 11:00 Lea Miko Versbach will talk on the topic &#8220;Implicit DG solvers and multigrid preconditioners&#8221;\u00a0<\/strong><\/p>\n<p><strong>Location: <\/strong>Gyrhofstra\u00dfe 8a (Geb\u00e4ude 158a), Room 1.105 (1st floor), 50931<\/p>\n<p><strong>Abstract:\u00a0<\/strong>In this talk I will give an introduction to implicit DG solvers and the challenges which arise when solving the large\u00a0nonlinear systems coming from the implicit temporal discretization. We will solve these system using a Jacobian-free Newton-Krylov method. The problem with this method is that the Krylov subspace method converges slowly for discretized PDEs. In order to speed up computations, we need to\u00a0construct\u00a0preconditioners. This can be done using iterative methods. Carefully constructed multigrid methods are cheap and effective preconditioners. I will explain more details about the construction of these preconditioners and show some numerical results.\u00a0<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>On Wednesday, 5 February 2020 at 11:00 Lea Miko Versbach will talk on the topic &#8220;Implicit DG solvers and multigrid preconditioners&#8221;\u00a0 Location: Gyrhofstra\u00dfe 8a (Geb\u00e4ude 158a), Room 1.105 (1st floor), 50931 Abstract:\u00a0In this talk I will give an introduction to &hellip; <a href=\"https:\/\/www.mi.uni-koeln.de\/NumSim\/2020\/02\/04\/upcoming-talk-lea-miko-versbach-lund-university-sweden-implicit-dg-solvers-and-multigrid-preconditioners-05-02-2020-11am\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48],"tags":[],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/www.mi.uni-koeln.de\/NumSim\/wp-json\/wp\/v2\/posts\/4785"}],"collection":[{"href":"https:\/\/www.mi.uni-koeln.de\/NumSim\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mi.uni-koeln.de\/NumSim\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mi.uni-koeln.de\/NumSim\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mi.uni-koeln.de\/NumSim\/wp-json\/wp\/v2\/comments?post=4785"}],"version-history":[{"count":4,"href":"https:\/\/www.mi.uni-koeln.de\/NumSim\/wp-json\/wp\/v2\/posts\/4785\/revisions"}],"predecessor-version":[{"id":4790,"href":"https:\/\/www.mi.uni-koeln.de\/NumSim\/wp-json\/wp\/v2\/posts\/4785\/revisions\/4790"}],"wp:attachment":[{"href":"https:\/\/www.mi.uni-koeln.de\/NumSim\/wp-json\/wp\/v2\/media?parent=4785"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mi.uni-koeln.de\/NumSim\/wp-json\/wp\/v2\/categories?post=4785"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mi.uni-koeln.de\/NumSim\/wp-json\/wp\/v2\/tags?post=4785"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}