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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Comparing the transitional behaviour of kaolinite and bentonite suspension flows
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Comparing the transitional behaviour of kaolinite and bentonite suspension flows

机译：比较高岭土和膨润土悬浮液的过渡行为

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Past research has demonstrated the dramatic effects that variations in suspended clay can have on the properties of flow by producing a range of transitional flows between turbulent and laminar states, depending on clay concentration and fluid shear. Past studies have been restricted to kaolinite flows, a clay mineral that has relatively weak cohesive properties. This paper extends these studies to suspension flows of bentonite, a clay mineral that attains higher viscosities at far lower volumetric concentrations within a flow. The results show that the types of transitional flow behaviour recognized in past studies can also be found in bentonite suspension flows, but at lower suspended sediment concentrations, thus demonstrating an even more dramatic effect on flow properties, and potentially on sediment transport and resulting bed morphology, than kaolinite flows. The paper proposes new stability diagrams for the phase space of bentonite flows and compares these to past work on kaolinite suspension flows. These new data suggest that the transitional-flow Reynolds number can be used to delineate the types of transitional flow across different clay types and assess modern and ancient clay-suspension flows. (c) 2016 The Authors. Earth Surface Processes and Landforms published by John Wiley & Sons Ltd.
机译：过去的研究表明，取决于粘土浓度和流体剪切力，在湍流和层流状态之间产生一系列过渡流动，悬浮粘土的变化会对流动特性产生巨大影响。过去的研究仅限于高岭石流，这是一种黏性相对较弱的粘土矿物。本文将这些研究扩展到膨润土的悬浮液中，膨润土是一种粘土矿物，在较低的体积浓度下可达到较高的粘度。结果表明，在过去的研究中认识到的过渡流动行为类型也可以在膨润土悬浮液中找到，但是在较低的悬浮沉积物浓度下，因此显示出对流动特性的更大影响，并可能对沉积物的输送和最终的床层形态产生更大的影响。比高岭石流动。本文为膨润土流的相空间提出了新的稳定性图，并将其与过去在高岭石悬浮液中的工作进行了比较。这些新数据表明，过渡流雷诺数可用于描述不同黏土类型之间的过渡流类型，并评估现代和古代黏土悬浮流。 （c）2016作者。约翰·威利父子有限公司（John Wiley＆Sons Ltd.）发布的《地球表面过程和地形》

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