Liquid buckling in a practical situation

Liquid buckling in a practical situation
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实际情况中的液体屈曲

DOI：
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发表时间：
2016
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影响因子：
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通讯作者：
Prasanta Kumar Das
Prasanta Kumar Das
中科院分区：
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文献类型：
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作者：
Sumana Ghosh;G. Das;Prasanta Kumar Das

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当油丝在流动路径中遇到突然膨胀时，在高粘度油和水的岩心环空流动中观察到油丝的屈曲。提出了合适的数学方程来预测屈曲起始点距变形油芯的面积变化面和其他特征的距离。提出屈曲的起因取决于惯性力和粘性力的平衡。该模型预测，随着石油流量的增加，流体射流必须从面积变化平面移动更远的距离才能启动屈曲。由该模型还预测了屈曲油丝的频率和半径。
Buckling of an oil filament is observed during the core annular flow of high viscous oil and water, when it encountered a sudden expansion in its flow path. Suitable mathematical equations have been suggested to predict the distance of initiation of buckling from the plane of area change and other characteristics of the deformed oil core. It is proposed that the initiation of buckling depends on the balance of inertial and viscous forces. The model predicts that as the oil flow rate increases, the fluid jet has to travel a larger distance from the plane of area change to initiate buckling. Frequency and radius of the buckled oil filament are also predicted from the model.