Plug flow and the breakdown of Bagnold scaling in cohesive granular flows

@article{citeulike:2420561, abstract = {Cohesive granular media flowing down an inclined plane are studied by discrete element simulations. Previous work on cohesionless granular media demonstrated that within the steady flow regime where gravitational energy is balanced by dissipation arising from intergrain forces, the velocity profile in the flow direction scales with depth in a manner consistent with the predictions of Bagnold. Here we demonstrate that this Bagnold scaling does not hold for the analogous steady flows in cohesive granular media. We develop a generalization of the Bagnold constitutive relation to account for our observation and speculate as to the underlying physical mechanisms responsible for the different constitutive laws for cohesive and noncohesive granular media.}, author = {Brewster, Robert and Grest, Gary S. and Landry, James W. and Levine, Alex J. }, citeulike-article-id = {2420561}, doi = {http://dx.doi.org/10.1103/PhysRevE.72.061301}, journal = {Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)}, keywords = {granular\_cohesive, granular\_flow, qualifier}, number = {6}, posted-at = {2008-02-24 06:46:22}, priority = {2}, publisher = {APS}, title = {Plug flow and the breakdown of Bagnold scaling in cohesive granular flows}, url = {http://dx.doi.org/10.1103/PhysRevE.72.061301}, volume = {72}, year = {2005} }

TY - JOUR ID - citeulike:2420561 L3 - citeulike-article-id:2420561 TI - Plug flow and the breakdown of Bagnold scaling in cohesive granular flows JF - Physical Review E (Statistical, Nonlinear, and Soft Matter Physics) VL - 72 IS - 6 PB - APS N2 - Cohesive granular media flowing down an inclined plane are studied by discrete element simulations. Previous work on cohesionless granular media demonstrated that within the steady flow regime where gravitational energy is balanced by dissipation arising from intergrain forces, the velocity profile in the flow direction scales with depth in a manner consistent with the predictions of Bagnold. Here we demonstrate that this Bagnold scaling does not hold for the analogous steady flows in cohesive granular media. We develop a generalization of the Bagnold constitutive relation to account for our observation and speculate as to the underlying physical mechanisms responsible for the different constitutive laws for cohesive and noncohesive granular media. KW - granular_cohesive KW - granular_flow KW - qualifier AU - Brewster, Robert AU - Grest, Gary AU - Landry, James AU - Levine, Alex PY - 2005/// UR - http://dx.doi.org/10.1103/PhysRevE.72.061301 ER -