Abstract In the present work, experimental studies were conducted to examine the gas-slurry interfacial shear stress and frictional pressure drop in the presence and absence of surfactant in a rectangular slurry column. A novel mechanistic model has been proposed by considering the energy dissipation rate because of bubble formation, a slip of gas-slurry interface, and the wetting of a thin liquid layer with the column wall. A comprehensive investigation was carried out to enunciate the effect of particle loading, particle size, bubble size, and surfactant on the frictional pressure drop and bubble-slurry interfacial shear stress. Generalized empirical correlations were also developed based on the dynamic variables, geometric variables, and physical properties of the system.

中文翻译：

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在存在和不存在表面活性剂的情况下，矩形柱中的气泡浆界面剪切应力和摩擦压降

摘要 在目前的工作中，进行了实验研究，以检查矩形浆液柱中存在和不存在表面活性剂时的气体-浆液界面剪切应力和摩擦压降。通过考虑由于气泡形成、气-浆界面滑移以及薄液层与柱壁润湿引起的能量耗散率，提出了一种新的机理模型。进行了一项综合研究，以阐明颗粒负载、颗粒尺寸、气泡尺寸和表面活性剂对摩擦压降和气泡-浆料界面剪切应力的影响。还基于系统的动态变量、几何变量和物理特性开发了广义经验相关性。