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	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				Thursday, January 28, 201009:00 AM - 10:00 AMCNLS Conference Room (TA-3, Bldg 1690) Seminar Jacobian-Free Newton-Krylov Methods for Multiphysics Applications Christopher K. NewmanIdaho National Laboratory Utilizing state of the art mathematics and modern software development techniques, we are deploying next generation tools for multiphysics applications. The Jacobian-free Newton-Krylov (JFNK) method combined with physics-based preconditioning provides the underlying structure for our tools. Preconditioned JFNK provides a robust solution method for systems of coupled nonlinear partial differential equations which often arise in simulation of nuclear processes. To facilitate rapid development of multiphysics applications, we have developed the Multiphysics Object-Oriented Simulation Environment (MOOSE). We review the methods and present examples from two MOOSE based applications, BISON (fuel performance simulation) and PRONGHORN (gas cooled reactor simulation). Host: Bryan Lally