使用非牛顿流体的压延工艺中的滑移和磁流体力学(MHD)数值研究

IF 1.4 4区 工程技术 Q2 ENGINEERING, MULTIDISCIPLINARY
M. A. Javed, U. Shehzadi, A. Sowayan, H. M. Atif, M. Nazeer, Sami Ullah, Khan
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引用次数: 0

摘要

本研究介绍了具有非线性滑移条件的 Oldroyd 4 常量模型的压延过程。我们利用基本定律来制定流动方程,然后根据润滑近似理论对其进行简化。我们引入了流函数来消除压力梯度,然后使用 "bvp4c 方法 "对最终方程进行数值求解,以确定流函数和速度剖面。压延操作的压力梯度、压力和机械量采用 Runge-Kutta 4th -order 方法计算。通过各种图表,讨论了奥尔德罗伊德四常数流体的滑移、哈特曼数和材料参数如何影响压延的速度、压力梯度和其他相关特性。结果表明,与无滑移情况相比,压延机内部的压力分布和接触长度随着滑移参数值的增加而减小。另一方面,哈特曼数会增加压力。此外,随着滑移参数值(Kn)的增加,最终板材厚度也会减小。力和功率是 1  的递减函数,相反,这些量随着离开距离 (  ) 值的增加而增加。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Numerical study of slip and Magnetohydrodynamics (MHD) in calendering process using non-Newtonian fluid
In this study, calendering process of an Oldroyd 4-constant model with the non-linear slip condition is presented. The fundamental laws are used to formulate the flow equations and then are simplified under lubrication approximation theory. We introduced the stream function to eradicate the pressure gradient and then numerically solved the final equations using the "bvp4c method" to determine the stream function and velocity profiles. The pressure gradient, pressure, and mechanical quantities of calendering operations are computed using the Runge-Kutta 4 th -order approach. Using a variety of graphs, it is discussed how the slip, Hartmann number, and material parameters of an Oldroyd 4-constant fluid affect the velocity, pressure gradient, and other associated characteristics of calendering. The results reveal that on comparing to the no-slip situation, the pressure distribution inside the calender and the length of contact decreases with increasing slip parameter values. On the other hand, the Hartmann number is responsible to enhance pressure. Furthermore, a reduction is observed in final sheet thickness with increases the values of the slip parameter ( Kn ). The force and power are the decreasing function of 1  , conversely, these quantities increase with enhancing the values of leave off distance (  ).
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来源期刊
Scientia Iranica
Scientia Iranica 工程技术-工程:综合
CiteScore
2.90
自引率
7.10%
发文量
59
审稿时长
2 months
期刊介绍: The objectives of Scientia Iranica are two-fold. The first is to provide a forum for the presentation of original works by scientists and engineers from around the world. The second is to open an effective channel to enhance the level of communication between scientists and engineers and the exchange of state-of-the-art research and ideas. The scope of the journal is broad and multidisciplinary in technical sciences and engineering. It encompasses theoretical and experimental research. Specific areas include but not limited to chemistry, chemical engineering, civil engineering, control and computer engineering, electrical engineering, material, manufacturing and industrial management, mathematics, mechanical engineering, nuclear engineering, petroleum engineering, physics, nanotechnology.
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