磁场和贯通流对含有陀螺仪微生物的福赫海默扩展达西-布林克曼多孔纳米流体层中开始热生物对流的影响的数值研究

IF 2.5 4区 工程技术 Q2 ENGINEERING, MECHANICAL Journal of Porous Media Pub Date : 2024-01-01 DOI:10.1615/jpormedia.2024049980
Arpan Garg, Y.D. Sharma, Subit K. Jain, Sanjalee Maheshwari
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引用次数: 0

摘要

本文对多孔介质中饱和的陀螺状微生物纳米流体悬浮液在垂直通流和二次阻力作用下发生的磁热生物对流进行了数值研究。利用改进的达西-布林克曼-福克海默模型来驱动控制方程。采用法向模式技术和线性稳定性分析来建立搅拌方程系统。利用八阶 Galerkin 方法从繁琐的特征值问题中数值提取临界热雷利数值。垂直贯通流和二次阻力的力量被认为可以增强热能传递并稳定纳米流体悬浮液,从而限制对流过程。磁场强度被认为会延缓磁-热-生物对流的发生。研究还发现,快速移动的回旋微生物和头重脚轻的纳米流体浓度形成了一个不稳定的系统,加速了磁热液生物对流的开始。这项工作的成果可应用于微流控装置、提高石油采收率以及控制对流过程速度的许多其他领域。
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Numerical study of the influence of magnetic field and throughflow on the onset of thermo-bio-convection in a Forchheimer‑extended Darcy-Brinkman porous nanofluid layer containing gyrotactic microorganisms
This paper accommodates numerical investigation on the onset of magneto-thermo-bioconvection in nanofluid suspension of gyrotactic microbes saturated in a porous medium under the imposition of vertical throughflow and quadratic drag. The modified Darcy-Brinkman-Forchheimer model is utilized to drive the governing equations. The normal mode technique along with linear stability analysis is imposed to establish the agitated system of equations. An eight-order Galerkin methodology is utilized to numerically extract the critical thermal Rayleigh number values from the tedious eigenvalue problem. The power of vertical throughflow and quadratic drag is perceived to enhance the thermal energy transfer and stabilize the nanofluid suspension that consequently tries to restrict the convective process. The intensity of the magnetic field is identified to delay the onset of magneto-thermo-bioconvection. It is also found that the presence of fast-moving gyrotactic microorganisms and top-heavy nanofluid concentration form an unstable system to accelerate the beginning of the magneto-thermo-bioconvection. The outcome of this work may find applications in microfluidic devices, enhanced oil recovery, and many other areas for controlling the speed of the convective process.
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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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