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首页> 外文会议>2002 ASME International Mechanical Engineering Congress and Exposition , Nov 17-22, 2002, New Orleans, Louisiana >LAMINAR, TRANSITIONAL AND TURBULENT MOTION OF FRUIT PUREES WITHIN CIRCULAR PIPES
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LAMINAR, TRANSITIONAL AND TURBULENT MOTION OF FRUIT PUREES WITHIN CIRCULAR PIPES

机译：圆管内水果粉的层流，过渡和湍流运动

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摘要

The results of an experimental investigation aimed to study both the rheological and fluid dynamic behaviour of two kinds of fruit purees at different pulp concentrations are presented in this work. An experimental setup based on the rectilinear pipe vis-cometer principle was used for a preliminary rheological investigation of the analyzed products. By applying either the classical Rabinowitsch and Mooney or the recent Thikonov method of reg-ularization of integral equations, these products could reliably be considered as purely-viscous time-independent fluids. The laminar motion was described by means of the well known Metzner and Reed method while the corresponding resistance laws for turbulent motion were modeled by using the Dodge and Metzner method. The comparison of the point onset of turbulence against the ones obtained by means of the Mishra and Thripati and Hanks formulas would, however, suggest that in transitional regime the viscoelastic effects could have non-negligible influence on the dynamics.
机译：旨在研究两种果肉在不同果肉浓度下的流变和流体动力学行为的实验研究结果在本工作中提出。基于直线管粘度计原理的实验装置用于所分析产品的初步流变研究。通过应用经典的Rabinowitsch和Mooney或最近的Thikonov积分方程正则化方法，这些乘积可以可靠地视为纯粘滞时间无关的流体。层流运动是通过众所周知的Metzner和Reed方法描述的，而相应的湍流阻力定律是使用Dodge和Metzner方法建模的。然而，将湍流点的起点与通过Mishra和Thripati和Hanks公式获得的点的起点进行比较将表明，在过渡状态下，粘弹性效应对动力学的影响不可忽略。

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