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	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				Monday, March 17, 200810:00 AM - 11:00 AMCNLS Conference Room (TA-3, Bldg 1690) Seminar Computation of High Frequency Waves in Heterogeneous Media Shi JinUniversity of Wisconsin We introduce Eulerian methods that are efficient in computing high frequency waves through heterogeneous media. The method is based on the classical Liouville equation in phase space, with discontinous Hamiltonians (or singular coefficients) due to the barriers or material interfaces. We provide physically relevant interface conditions consistent with the correct transmissions and reflections, and then build the interface conditions into the numerical fluxes. This method allows the resolution of high frequency waves without numerically resolving the small wave lengths, and capture the correct transmissions and reflections at the interface. We will extend this method to deal with diffractions and quantum barriers. Host: Cory Hauck