TURBULENT FLOW OF NON-NEWTONIAN SYSTEMS
TURBULENT FLOW OF NON-NEWTONIAN SYSTEMS
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DOI：
10.1002/aic.690050214
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发表时间：
1959-01-01
期刊：
影响因子：
3.7
通讯作者：
METZNER, AB
中科院分区：
文献类型：
--
作者：
DODGE, DW;METZNER, AB
本文首次对非牛顿流体在光滑圆管中的湍流流动进行了理论分析，提出了压力损失与平均流量的伴随关系的全新概念。此外，分析允许预测非牛顿湍流速度分布，这是一个主题上的出版文献是完全沉默的。为了证实理论分析，实验数据上采取的聚合物凝胶和固-液悬浮液在顺向流动条件下。在雷诺数高达36，000时，研究了流动行为指数在0.3和1.0之间的流体系统。所有的全湍流实验数据支持理论分析的有效性。最后的阻力定律关联式代表了湍流中牛顿流体的von Karman方程的推广，并且适用于剪切速率仅取决于剪切应力的所有非牛顿流体，而与流变学类别无关。所有的非牛顿系统的湍流实验数据都是用这个方法关联的。平均偏差为1.9%。
A theoretical analysis for turbulent flow of non-Newtonian fluids through smooth round tubes has been performed for the first time and has yielded a completely new concept of the attending relationship between the pressure loss and mean flow rate. In addition, the analysis has permitted the prediction of non-Newtonian turbulent velocity profiles, a topic on which the published literature is entirely silent. To confirm the theoretical analysis, experimental data were taken on both polymeric gels and solid-liquid suspensions under turbulent-flow conditions. Fluid systems with flow-behavior indexes between 0.3 and 1.0 were studied at Reynolds numbers as high as 36,000. All the fully turbulent experimental data supported the validity of the theoretical analysis. The final resistance-law correlation represents a generalization of von Karman’s equation for Newtonian fiuids in turbulent flow and is applicable to all non-Newtonians for which the shear rate depends only on shear stress, irrespective of rheological class& cation. All the turbulent experimental data for the non-Newtonian systems were correlated by this _...-..-ship with a mean deviation of 1.9%.