Lab Home | Phone | Search
	Center for Nonlinear Studies
	Home  ▶ People   Current   Affiliates   Alumni   Visitors   Students  ▶ Research   ICAM-LANL  ▶ Publications   2007   2006   2005   2004   2003   2002   2001   2000   <1999  ▶ Conferences   Workshops   Sponsorship  ▶ Talks   Colloquia   Seminars   Quantum Lunch   CMS Colloquia   Archive   Kac Lectures   Dist. Quant. Lecture   Ulam Scholar   Colloquia     Jobs  ▶ Students   Summer Research   Graduate Positions  ▶ Visitors   Description  ▶ Services   General   PD Travel Request     History of CNLS     Maps, Directions   CNLS Office   T-Division   LANL				Wednesday, November 02, 201111:00 AM - 12:00 PMCNLS Conference Room (TA-3, Bldg 1690) Seminar The time integration landscape for multi-physics problems and tightly coupled solvers with loosely coupled software: multi-physics and time integration in PETSc Jed BrownArgonne National Laboratory Multiphysics software often relies on ad-hoc operator splitting methods, largely due to implementation complexity and commitment required to use fully implicit methods. PETSc's new algebraic interfaces for coupling enable maintainable single-physics assembly routines to be reused for semi- or fully-implicit multi-physics with a runtime choice of monolithic or field-split solvers. Runtime choice of a nested matrix format requires no additional memory for field-split and each single-physics block uses the best available matrix format (blocked and/or symmetric). Fully implicit and IMEX time integrators with adaptive error control are also available through a common interface. Host: Xianzhu Tang, T-5, 665-2141