Pedro Jordan, PhD, of the U.S. Naval Research Laboratory, Stennis Space Center, will discuss "Nonlinear Poroacoustic Flow in Rigid Porous Media" on Nov. 15, 11:30 a.m.-1 p.m. in the Guttenberg Information Technologies Center 3710. The event is the third in the Fall 2010 Granular and Multiphase Flows Colloquium Series sponsored by the Granular Science Laboratory.