Dense granular flow — A collaborative study

a Procter & Gamble Co., Cincinnati, OH, USA b Department of Chemical Engineering, University of Delaware, Newark, DE, USA c International Fine Particle Research Institute, Wilmington, DE, USA d Department of Physics, Center for Nonlinear and Complex Systems, Duke University, Durham, NC, USA e Aerospace and Mechanical Engineering, University of Southern California, Los Angeles, CA, USA f Department of Mathematical Sciences and Center for Applied Mathematics and Statistics, New Jersey Institute of Technology, Newark, NJ, USA g Merck & Co., Inc., West Point, PA, USA h Benjamin Levich Institute and Department of Physics, The City College of the City University of New York, NY, USA i TGS-Nopec Geophysical Co., Houston, TX, USA j Department of Chemical Engineering, The City College of the City University of New York, NY, USA k School of Mechanical Engineering, Purdue University, West Lafayette, IN, USA