We have experimentally investigated granular flow through a quasi-two-dimensional hopper with two symmetric outlets on a flat bottom. The relationship between the flow rate and inter-orifice distance, namely the spacing between two outlets, for the whole range of outlets studied, is well described by an empirical equation we have presented. We have also measured the velocity and packing density profiles in the flow of particles above the outlets. We find that the packing density has a small fluctuation with respect to the inter-orifice distance, which may be considered as a constant based on zero order approximation. On the assumption of continuous flow and a constant packing density, we prove that the relation between the flow rate and the inter-orifice distance is mainly attributed to the velocity above each outlet, which is affected by a repulsive interaction between two outlets.

我们已经通过实验研究了通过准二维漏斗的颗粒流，该漏斗在平坦底部具有两个对称出口。对于所研究的整个出口范围，流量与节流孔间距离（即两个出口之间的间距）之间的关系已通过我们提出的经验方程很好地描述了。我们还测量了出口上方颗粒流中的速度和堆积密度分布。我们发现，堆积密度相对于孔间距离具有较小的波动，基于零阶逼近可以将其视为一个常数。在连续流动和填充密度恒定的假设下，我们证明了流量与孔间距离之间的关系主要归因于每个出口上方的速度，