Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session S01: Poster Session & Refreshment Break IV (3:34 - 4:25 p.m.)
3:34 PM,
Monday, November 20, 2023
Room: Exhibit Hall D
Abstract: S01.00147 : Granular Flow through a Wedge-shaped Hopper: Discrete Element Method Simulations for the Smooth Wall, Radial Gravity Problem*
Presenter:
Afroz F Momin
(IIT Bombay)
Authors:
Afroz F Momin
(IIT Bombay)
Devang V Khakhar
(IIT Bombay)
The gravity flow of particulate solids occurs in various industries. The simplest version of the flow is a wedge-shaped, quasi-two-dimensional geometry with smooth walls and a gravitational force that is directed radially towards the apex of the wedge. Theoretical analysis of the flow using the Mohr-Coulomb criterion
was carried out in the classical work of Savage (1965) and using a critical state theory by Ravi Prakash and Rao (1988).
Discrete Element Method simulations are carried out on particles for the smooth-wall
radial gravity (SWRG) hopper to test the existing theories. Our
computational results match with the predictions of the theories of Savage and Rao,
except for the region close to the exit, where both frictional and viscous effects are present. To further comprehend this
behaviour, a parametric study is performed. The conclusion is that velocity increases as the flow rate increases but decreases as the wedge angle and friction coefficient increase. It is anticipated that stresses at the exit are caused by the transfer of momentum transfer between collisions. It is shown that viscosity and volume fraction have
power law relations with the inertial number and data collapsed into a single curve.
*IRCC, IIT Bombay & DST, India
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