In this study, the effects of impeller rotation speed, off‐bottom clearance, blade angle, types of solid and liquid, etc., on the suspension pattern of sedimentary particles and particle rise height in liquid were investigated with a hemispherical vessel without baffles under low particle concentration. The transition conditions of suspension pattern between regimes I and II, and regimes II and III, were observed visually, and their non‐dimensional equations were expressed with an acceptable correlation by varying the above operation factors a great deal. Here, regime I is stagnation of particles on a vessel bottom, II is partial suspension, and III is complete suspension in liquid. The non‐dimensional equation of the maximum particle rise height was also successfully obtained. The combination of the non‐dimensional equations of transition and maximum particle rise height permitted us to determine the adequate solid/liquid mixing operation conditions without collision of particles with device parts.

中文翻译：

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机械搅拌容器中低浓度沉降颗粒的悬浮模式和上升高度

在这项研究中，研究了在不带挡板的半球形容器下，叶轮转速，离地间隙，叶片角度，固体和液体类型等对沉积颗粒的悬浮模式和液体中颗粒上升高度的影响。低颗粒浓度。目视观察状态I和II以及状态II和III之间的悬架模式的过渡条件，并且通过大量改变上述操作因子，可以将它们的无量纲方程表达为可以接受的相关性。在这里，方案I是颗粒在容器底部的停滞，II是部分悬浮，III是在液体中的完全悬浮。还成功获得了最大粒子上升高度的无量纲方程。