In this paper, the transient MRF approach coupled with the standard k - ε and SST k - ω turbulence models was employed to study the effect of bottom shape, impeller diameter ( D J ) and bottom height ( H 2 ) on critical impeller off-bottom clearance ( C ). It was found the bottom shape and bottom height ( H 2 ) have obvious influence on the flow pattern transition from double-loop to single-loop of RT impeller. The flow pattern transition mechanism was inferred to relate to the relationship between the space required by the lower circulation zone and the actual space. The boundary conditions of critical C were further concluded to help distinguish the flow pattern and receive the expected one in the stirred vessel design.

中文翻译：

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Rushton涡轮搅拌容器几何特性对流型及过渡机理影响的CFD研究

本文采用瞬态 MRF 方法与标准 k - ε 和 SST k - ω 湍流模型相结合，研究了底部形状、叶轮直径 (DJ) 和底部高度 (H 2 ) 对临界叶轮离底的影响。间隙（C）。发现底部形状和底部高度（H 2 ）对RT叶轮双回路向单回路的流型过渡有明显影响。推测流型转变机制与下环流带所需空间与实际空间的关系有关。进一步总结了临界 C 的边界条件，以帮助区分流动模式并在搅拌容器设计中获得预期的流动模式。