Measurements carried out on the large scale silo in absence / presence of a double cone
insert showed that, during filling, an insert might lead to slight increases of normal
pressure and its unevenness at the transition level . The effect on the normal pressure was
quite limited in the barrel of the silo, with a dramatic decrease in the hopper. It is also
confirmed that, during discharging, the installation of an insert, while raising only
slightly the normal pressure on the wall in the barrel of the silo, increased substantially
the normal pressure in a region close to the transition in the hopper, but reduced
considerably such a pressure in the lower part of the hopper. It might also lead to an
unevenness of distribution of normal pressure at the transition level.