Material flow in a rectangular quasi-two-dimensional silo discharging simultaneously through two orifices has been investigated. A number of variations of the proximity of the sidewall of the silo with an individual orifice and the distance between the two orifices have been tried. It has been observed that beyond a certain distance between the two orifices, a neutral axis parallel to the axes of the orifices can be identified. The neutral axis divides the flow field in the silo between two non-interfering zones each of which is created due to the flow through a single orifice. Flow field created by a single orifice on the other hand depends on its proximity to the sidewall. Based on the above observation, an extension of the kinematic model for material discharge through a single orifice has been extended for predicting the velocity field during simultaneous discharge through two orifices. Based on the distance between two orifices, the limitation of this model has also been predicted.
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