abstract

• Convection velocity measurements in vertically vibrated granular materials are presented. The convection velocity close to the walls grows quadratically with the difference between the maximum and critical, or excess, amplitude Ae (proposed as a dynamic parameter to describe related problems) and it is shown numerically that the average bed-bottom relative velocity during the distancing between them, grows linearly with the squared Ae as well. This is interpreted as the signature of an inertial shearing force or momentum transfer proportional to the bed-container relative velocity, acting mainly during the bed-plate distancing part of each cycle which leads to the formation of the convective flux. © 2006 The American Physical Society.

authors

• Nahmad Molinari Yuri
• Rodríguez-Liñán G.M.

publication date

• 2006-01-01

published in

• Physical Review E - Statistical, Nonlinear, and Soft Matter Physics  Journal

keywords

• Granular materials; Shear flow; Convection velocity measurements; Convective flux; Shearing inertial forces; Heat convection

Digital Object Identifier (DOI)

• 10.1103/PhysRevE.73.011302

start page

end page

volume

• 73

issue

• 1