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首页> 外文期刊>Journal of enhanced heat transfer >PERISTALTIC MOTION OF NON-NEWTONIAN FLUID WITH VARIABLE LIQUID PROPERTIES IN A CONVECTIVELY HEATED NONUNIFORM TUBE: RABINOWITSCH FLUID MODEL
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PERISTALTIC MOTION OF NON-NEWTONIAN FLUID WITH VARIABLE LIQUID PROPERTIES IN A CONVECTIVELY HEATED NONUNIFORM TUBE: RABINOWITSCH FLUID MODEL

机译：对流加热非均匀管中具有可变液体性质的非牛顿流体的蠕变运动：RABINOWITSCH流体模型

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摘要

This paper investigates the effects of variation in viscosity and thermal conductivity on the peristaltic mechanism of Rabinowitsch fluid through a nonuniform tube. The convective surface conditions and wall properties are taken into account. The governing equations of motion, momentum, and energy are rendered dimensionless and are solved using long wavelength and small Reynolds number approximations. The series solution technique is employed to solve the resulting nonlinear temperature equation. The effects of relevant parameters on physiological quantities of interest are analyzed graphically, and the validation of the present model with the existing literature has been presented through graphs. The outcomes of the study reveal that an increase in the value of variable viscosity and thermal conductivity enhances the velocity and temperature profiles for dilatant, Newtonian, and pseudoplastic fluid models. Further, an increase in the value of variable viscosity enhances the skin friction coefficient and Nusselt number. Moreover, the presence of variable viscosity diminishes the volume of the trapped bolus.
机译：本文研究了粘度和导热率变化对通过不均匀管的Rabinowitsch流体蠕动机理的影响。对流的表面条件和壁的特性也要考虑在内。运动，动量和能量的控制方程式变为无量纲，并使用长波长和小的雷诺数近似法求解。采用级数求解技术来求解所得的非线性温度方程。用图形分析了相关参数对感兴趣的生理量的影响，并通过图形表示了现有模型对本模型的验证。研究结果表明，可变粘度和热导率值的增加会增强膨胀，牛顿和假塑性流体模型的速度和温度分布。此外，增加可变粘度的值会增加皮肤摩擦系数和努塞尔数。而且，可变粘度的存在减小了所捕获的团块的体积。

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