TY - JOUR
T1 - The role of deposition process on pressure dip formation underneath a granular pile
AU - Ai, J.
AU - Ooi, J.Y.
AU - Chen, Jian Fei
AU - Rotter, J.M.
AU - Zhong, Z.
PY - 2013/8/14
Y1 - 2013/8/14
N2 - This paper describes an experimental investigation on the pressure dip phenomenon in a conical pile of granular solids. The roles of different deposition processes such as the pouring rate, pouring height and deposition jet size on the pressure dip formation were studied. Test results confirmed that the pressure dip is a robust phenomenon in a pile formed by top deposition. When the deposition jet radius is significantly smaller than the final pile radius (i.e. concentrated deposition), a dip developed in the centre as shown in previous studies. However, when the deposition jet radius is comparable to the final pile radius (i.e. diffuse deposition), the location of the dip moves towards the edge of deposition jet, with a local maximum pressure developed in the centre. For concentrated deposition, an increase in the pouring rate may enhance the depth of the dip and reduce its width, while an increase in the pouring height has only a negligible effect in the studied range. The results suggest the pressure dip is closely related to the initial location, intensity and form of downslope flows.
AB - This paper describes an experimental investigation on the pressure dip phenomenon in a conical pile of granular solids. The roles of different deposition processes such as the pouring rate, pouring height and deposition jet size on the pressure dip formation were studied. Test results confirmed that the pressure dip is a robust phenomenon in a pile formed by top deposition. When the deposition jet radius is significantly smaller than the final pile radius (i.e. concentrated deposition), a dip developed in the centre as shown in previous studies. However, when the deposition jet radius is comparable to the final pile radius (i.e. diffuse deposition), the location of the dip moves towards the edge of deposition jet, with a local maximum pressure developed in the centre. For concentrated deposition, an increase in the pouring rate may enhance the depth of the dip and reduce its width, while an increase in the pouring height has only a negligible effect in the studied range. The results suggest the pressure dip is closely related to the initial location, intensity and form of downslope flows.
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-84883519280&partnerID=8YFLogxK
U2 - 10.1016/j.mechmat.2013.08.005
DO - 10.1016/j.mechmat.2013.08.005
M3 - Article
AN - SCOPUS:84883519280
SN - 0167-6636
VL - 66
SP - 160
EP - 171
JO - Mechanics of Materials
JF - Mechanics of Materials
ER -