粘土纳米流体在达西-布林克曼多孔介质垂直表面上的对流和热传输

IF 2.5 4区 工程技术 Q2 ENGINEERING, MECHANICAL
Umair Khan, Aurang Zaib, Anuar Ishak, El-Sayed M. Sherif, Ioan Pop
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引用次数: 0

摘要

钻井液对于通过岩石和土壤提取石油和天然气非常重要。纳米粘土颗粒对提高钻井液效率至关重要。加入粘土纳米粒子后,钻井液的导热性、粘度和沸点都会增加,从而提供耐高温性并调节流体成本。本文阐述了钻井纳米流体中的对流传热,同时考虑了钻井液中粘土纳米粒子的大量存在。使用 Maxwell-Garnett 和 Brinkman 公式对粘土纳米流体的高效热物理特性进行了数学表达。控制流动现象的线性 PDE 与物理边界条件是预先确定的。利用相似性技术将这些 PDE 转换为 ODE,然后利用高效的 bvp4c 求解器找到对偶解。计算出的努塞尔特数和表皮摩擦力与速度和温度曲线一起以表格和图形的形式显示出来。在可收缩板材和浮力辅助流动的情况下,观察到了多种解决方案。研究结果表明,当体积浓度增加时,努塞尔特数明显上升。此外,在下层解决方案中,渗透性参数扩大了边界层厚度,而在上层解决方案中则观察到相反的行为。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
CONVECTIVE FLOW AND HEAT TRANSPORT OF CLAY NANOFLUID ACROSS A VERTICAL SURFACE IN A DARCY-BRINKMAN POROUS MEDIUM
Drilling fluids are important in the extraction of oils and gases through rocks and soil. Clay nanoparticles are essential for enhancing drilling fluid efficiency. The thermal conductivity, viscosity, and boiling point of drilling fluids increase when clay nanoparticles are incorporated, providing resistance to high temperatures and regulating fluid costs. This article illustrates the convection heat transfer in drilling nanofluid while taking into account the significant presence of clay nanoparticles in the fluid used for drilling. The efficient thermophysical characteristics of clay nanofluid are expressed mathematically using Maxwell-Garnett and Brinkman's formulas. The linear PDEs with physical boundary conditions that control the flow phenomena are predetermined. The similarity technique is employed to transmute these PDEs into ODEs and then an efficient bvp4c solver is utilized to find dual solutions. The Nusselt number and skin friction are calculated and displayed in tabular form as well as graphical form along with the velocity and temperature profiles. Multiple solutions are observed in the case of shrinkable sheets as well as in the case of buoyancy assisting flow. The findings demonstrate that when volume concentration increases, the Nusselt number rises noticeably. In addition, the permeability parameter expands the boundary layer thickness in the lower solution, while the contrary behavior is observed in the upper solution.
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来源期刊
Journal of Porous Media
Journal of Porous Media 工程技术-工程:机械
CiteScore
3.50
自引率
8.70%
发文量
89
审稿时长
12.5 months
期刊介绍: The Journal of Porous Media publishes original full-length research articles (and technical notes) in a wide variety of areas related to porous media studies, such as mathematical modeling, numerical and experimental techniques, industrial and environmental heat and mass transfer, conduction, convection, radiation, particle transport and capillary effects, reactive flows, deformable porous media, biomedical applications, and mechanics of the porous substrate. Emphasis will be given to manuscripts that present novel findings pertinent to these areas. The journal will also consider publication of state-of-the-art reviews. Manuscripts applying known methods to previously solved problems or providing results in the absence of scientific motivation or application will not be accepted. Submitted articles should contribute to the understanding of specific scientific problems or to solution techniques that are useful in applications. Papers that link theory with computational practice to provide insight into the processes are welcome.
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