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Steady flow and heat transfer analysis of Phan-Thein-Tanner fluid in double-layer optical fiber coating analysis with Slip Conditions

机译:滑动条件下双层光纤涂层分析中潘氏-坦纳流体的稳态流动和传热分析

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摘要

Modern optical fibers require double-layer coating on the glass fiber to provide protection from signal attenuation and mechanical damage. The most important plastic resins used in wires and optical fibers are plastic polyvinyl chloride (PVC) and low-high density polyethylene (LDPE/HDPE), nylon and Polysulfone. In this paper, double-layer optical fiber coating is performed using melt polymer satisfying PTT fluid model in a pressure type die using wet-on-wet coating process. The assumption of fully developed flow of Phan-Thien-Tanner (PTT) fluid model, two-layer liquid flows of an immiscible fluid is modeled in an annular die, where the fiber is dragged at a higher speed. The equations characterizing the flow and heat transfer phenomena are solved exactly and the effects of emerging parameters (Deborah and slip parameters, characteristic velocity, radii ratio and Brinkman numbers on the axial velocity, flow rate, thickness of coated fiber optics, and temperature distribution) are reported in graphs. It is shown that an increase in the non-Newtonian parameters increase the velocity in the absence or presence of slip parameters which coincides with related work. The comparison is done with experimental work by taking λ → 0 (non-Newtonian parameter).
机译:现代光纤需要在玻璃纤维上进行双层涂层,以提供保护,防止信号衰减和机械损坏。电线和光纤中最重要的塑料树脂是塑料聚氯乙烯(PVC)和低高密度聚乙烯(LDPE / HDPE),尼龙和聚砜。在本文中,使用满足要求的PTT流体模型的熔融聚合物在压力型模具中采用湿对湿涂覆工艺进行双层光纤涂覆。假设Phan-Thien-Tanner(PTT)流体模型已完全开发,不溶混流体的两层液体流是在环形模具中建模的,其中纤维以较高的速度拖动。精确求解了表征流动和传热现象的方程式,并对新兴参数(Deborah和滑移参数,特征速度,半径比和Brinkman数对轴向速度,流速,镀膜光纤的厚度和温度分布)的影响进行了求解。以图表形式报告。结果表明,在不存在或存在滑动参数的情况下,非牛顿参数的增加会增加速度,这与相关功是一致的。通过取λ→0(非牛顿参数)与实验工作进行比较。

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