Lab Home | Phone | Search
	Center for Nonlinear Studies
	Home  ▶ People   Current   Executive Committee   Postdocs   Visitors   Students   Research   Publications  ▶ Conferences   Workshops   Sponsorship  ▶ Talks   Seminars   Postdoc Seminars Archive   Quantum Lunch   Quantum Lunch Archive   P/T Colloquia   Archive   Ulam Scholar     Postdoc Nominations  ▶ Student Requests   Student Program  ▶ Visitor Requests   Description   Past Visitors  ▶ Services   General     History of CNLS     Maps, Directions   CNLS Office   T-Division   LANL				Wednesday, June 20, 20073:00 PM - 4:00 PMCNLS Conference Room (TA-3, Bldg 1690) Seminar Singularities in Hele-Shaw flow Seung-Yeop LeeUniversity of Montreal Hele-Shaw flow is a two-dimensional boundary evolution between oil and air. I will talk about two types of singularities that may occur in Hele-Shaw flow: cusps and break-offs. To describe cusps I introduce a formulation of Hele-Shaw flow in terms of minimization problem in electrostatics, and discuss a branching solution that may be related to the further evolution of cusp after its singular moment. I also describe the process of break-offs that can happen in the time-reversed Hele-Shaw flow. I will explain the universal scaling behavior and the various solutions of break-offs. Host: William Hlavacek