Faculty DirectoryPaul Umbanhowar
Research Associate Professor
Contact2145 Sheridan Road
Evanston, IL 60208-3109
Email Paul Umbanhowar
PhD, The University of Texas at Austin (1996)
MS, Boston University (1991)
BA, Carleton College (1987)
Professor Umbanhowar's research in granular materials examines the interaction of legged devices and animals with unconsolidated substrates; the dependence of drag force and penetration resistance on granular material state and intruder geometry and kinematics; segregation, mixing, and flow in shaken, tumbled, fluidized, and stirred granular ensembles; and pattern formation and its connection to continuum theories of discrete particulate systems. Another related area of interest is motion control and self assembly/organization through vibrational manipulation of contact interactions mediated by friction and impact.
Thomas H. Vose, Paul Umbanhowar, and Kevin M. Lynch. Sliding manipulation of rigid bodies on a controlled 6-DoF plate. International Journal of Robotics Research 31:819 , 2012.
Ryan D. Maladen, Yang Ding, Paul B. Umbanhowar, Adam Kamor, and Daniel I. Goldman. Mechanical models of sandfish locomotion reveal principles of high performance subsurface sand-swimming. Journal of the Royal Society Interface, 8:1332, 2011.
Nick Gravish, Paul B. Umbanhowar, and Daniel I. Goldman. Florce and flow transition in plowed granular mdeia. Phys. Rev. Lett., 105:128301, 2010.
Paul B. Umbanhowar and Daniel I. Goldman. Granular impact and the critical packing state. PRE Rapid Communication, 82:010301R, 2010.
Thomas Vose, Paul Umbanhowar and Kevin Lynch. Friction-induced lines of attraction and repulsion for parts sliding on an oscillated plate. IEEE Transactions on Automation Science and Engineering, 6:685, 2009.
Chen Li, Paul B. Umbanhowar, Haldun Komsuoglu, Daniel E. Koditschek and Daniel I. Goldman, Sensitive dependence of the motion of a legged robot on granular media. Proc. Natl. Acad. Sci., 106:3029, 2009.
Ken Sakaie, Dennis Fenistein, T.J. Carroll, Martin van Hecke and Paul Umbanhowar. MR imaging of Reynolds dilatancy in the bulk of smooth granular flows. Eurphys. Lett., 84:38001, 2008.
Paul Umbanhowar and Kevin M. Lynch. Optimal vibratory stick-slip transport. IEEE Transactions on Automation Science and Engineering, 5:537, 2008.
Daniel I. Goldman and Paul Umbanhowar. Scaling and dynamics of sphere and disk impact into granular media, Phys. Rev. E., 77:021308, 2008.
Ashley Smart, Paul Umbanhowar and Julio Ottino. Effects of self-organization on transport in granular matter: A network based approach. Europhys. Lett., 79:24002, 2007.
Paul B. Umbanhowar and Daniel I. Goldman. Low density fragile states in cohesive powders. Am. J. Phys., 74:720-721, 2006.
Phil N. Segrè, Fun Liu, Paul Umbanhowar and David A. Weitz. Effective gravitational temperature for sedimentation. Nature, 409:594-597, 2001.
Paul B. Umbanhowar, Francisco Melo and Harry L. Swinney. Localized excitations in a vertically vibrated granular layer. Nature, 382:793-796, 1996.
In the Classroom
Professor Umbanhowar has taught courses on classical, quantum, and statistical mechanics, thermodynamics, electrodynamics, and mechanical vibrations. His teaching emphasizes the development of physical intuition and the underlying interrelation of methodologies.