Impacts of operating variables in forward roll coating process of viscous hybrid nanofluid

IF 1.7 4区 工程技术 Q4 POLYMER SCIENCE
Zaheer Abbas, Sibgha Iqbal, Sabeeh Khaliq, Muhammad Y. Rafiq
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引用次数: 0

Abstract

Roll coating plays a significant role in various coating industries such as magnetic records, wallpapers, wrapping, adhesive tapes, books and magazines, photographic and plastic films. The thin layer coating of a magnetohydrodynamic (MHD) viscous hybrid nanofluid by passing through the space between two co-rotating rolls has been studied in an isothermal and incompressible analysis. The governing equation of mass and momentum are obtained then dimensionless using lubrication approximation theory (LAT). The velocity, pressure gradient, and pressure distribution are determined by the exact solution. Using Simpson’s (3/8) rule for numerical integration, the complex integral is examined. Important engineering parameters including power and roll separating force delivered by the rolls to the fluid are also estimated numerically. Raising the volume fraction of nanoparticles raises the pressure distribution and pressure gradient while having little effect on the velocity profile. It seems that the magnetic field and hybrid nanofluid, both seem very advantageous for the efficient roll coating process, controlling the separation force, power input, and distance between the attachment and separation point.
粘性混合纳米流体正向辊涂过程中操作变量的影响
辊涂在磁记录、壁纸、包装、胶带、书刊、照相和塑料薄膜等各种涂层行业中发挥着重要作用。通过等温和不可压缩分析,研究了磁流体(MHD)粘性混合纳米流体通过两个共同旋转的辊子之间的空间进行薄层涂层的问题。利用润滑近似理论(LAT)得到了质量和动量的无量纲控制方程。速度、压力梯度和压力分布由精确解确定。利用辛普森(3/8)法则进行数值积分,对复积分进行了检验。此外,还对重要的工程参数进行了数值估算,包括轧辊向流体传递的功率和轧辊分离力。提高纳米颗粒的体积分数会增加压力分布和压力梯度,但对速度曲线影响不大。由此看来,磁场和混合纳米流体对于高效辊涂工艺、控制分离力、输入功率以及附着点和分离点之间的距离都非常有利。
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来源期刊
Journal of Polymer Engineering
Journal of Polymer Engineering 工程技术-高分子科学
CiteScore
3.20
自引率
5.00%
发文量
95
审稿时长
2.5 months
期刊介绍: Journal of Polymer Engineering publishes reviews, original basic and applied research contributions as well as recent technological developments in polymer engineering. Polymer engineering is a strongly interdisciplinary field and papers published by the journal may span areas such as polymer physics, polymer processing and engineering of polymer-based materials and their applications. The editors and the publisher are committed to high quality standards and rapid handling of the peer review and publication processes.
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