NDLI: Role of flying buttresses in the jamming of granular matter through multiple rectangular outlets

Content Provider	Springer Nature Link
Author	Mondal, Somnath Sharma, Mukul M.
Copyright Year	2013
Abstract	We present a simulation study on the formation of particle arches supported by flying buttresses that arrest the flow of monodisperse spherical particles through two adjacent slots (rectangular outlets) in a three-dimensional (3D) anisometric flat-bottomed silo discharging under gravity. Most previous experimental and simulation studies on the jamming of a silo have focused on a single outlet, and have shown that the mean number of particles exiting the silo before it jams depends on the ratio of outlet size to particle diameter ( $$R$$ ). In this paper, we look at the nature of jamming if there are two adjacent outlets and discover some new physical insights on how sand arches are mechanically supported and how they interact with each other. For a fixed slot width $$D_{o}$$ and particle diameter $$d$$ , the distance separating the two openings $$D_{w}$$ is varied. The distribution of $$N$$ particles exiting the silo before both slots are jammed is obtained for each $$D_{w}$$ . From these distributions, we show that as $$D_{w}$$ becomes less than approximately $$3d$$ , the particle arches on adjacent outlets start affecting each other, and mutually stable arches become harder to form. We show that in cases, where for a small orifice ratio $$R={D_o}/d$$ a single outlet would have easily jammed, two adjacent outlets do not jam. We propose that this is due to the importance of stable particles resting on the base of the silo adjacent to the arches, which redistribute the load much like a flying buttress does in Gothic arches.
Starting Page	125
Ending Page	132
Page Count	8
File Format	PDF
ISSN	14345021
Journal	Granular Matter
Volume Number	16
Issue Number	1
e-ISSN	14347636
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-12-12
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Arch Bridge Jamming Clogging Sieve Soft and Granular Matter, Complex Fluids and Microfluidics Engineering Fluid Dynamics Materials Science Geoengineering, Foundations, Hydraulics Industrial Chemistry/Chemical Engineering Engineering Thermodynamics, Heat and Mass Transfer
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Mechanics of Materials Materials Science

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