通过狭窄动脉的非稳态振荡达西血流的热分析

Q1 Chemical Engineering International Journal of Thermofluids Pub Date : 2024-09-21 DOI:10.1016/j.ijft.2024.100864
G. Shankar , E.P. Siva , D. Tripathi , O. Anwar Beg
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引用次数: 0

摘要

本研究旨在广泛概述热源和热辐射对通过卡松流体的狭窄动脉血流的影响。我们研究了非牛顿流体在振荡达西流下的行为。该分析探讨了狭窄动脉中的血流对卡松流体动量和能量曲线的影响。此外,本研究还进行了参数分析,以说明努塞尔特数和卡松参数的影响。热辐射和卡松-粘性参数值越高,速度场越大。布林克曼模型准确地表示了多孔材料造成的流动阻力,即达西阻力。冠状动脉的内部空间会产生富含胆固醇的脂肪斑块和血凝块,堵塞动脉,从而模拟了本研究中血液循环的病变情况。我们采用一组非维度变量,将电流流动的支配方程转换为无维度偏微分方程。分析方法得出了所研究问题的解决方案。这一发现与冠状动脉的自然血液循环有关,因为冠状动脉是多孔的。特定的动脉病变会在动脉管腔内形成一个可渗透的结构。目前的研究表明,可以通过调整外部磁场强度来控制血流量,同时可以通过增加或减少热导率来控制血液温度。图表展示了不同物理参数对速度、温度和浓度曲线的影响。当前研究的重要结果是,流体速度随着磁力和比奥特数的增加而减小,但当考虑达西数和霍尔参数时,流体速度会增加。随着卡松参数 (β)从 0.1 增加到 0.3,壁面剪切应力也在缓慢增加。当 β = 0.3 时,沿轴向(x)的百分比变化更为明显。这是因为壁面剪应力与卡松参数的数量成正比。
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Thermal analysis in unsteady oscillatory Darcy blood flow through stenosed artery
This study aims to provide an extensive overview of the consequences of heat source and thermal radiation on blood flow in stenosed arteries through Casson fluid. We examine the behaviour of an unsteady non-Newtonian fluid under oscillatory Darcy flow. This analysis explores the impact of blood flow in the stenosed arteries on the momentum and energy profiles of the Casson fluid. In addition, this study examines a parametric analysis to illustrate the impact of the Nusselt number and Casson parameter. Higher values of the thermal radiation and Casson-Viscous parameters result in enhanced velocity fields. The Brinkman model accurately represents the resistance to flow caused by the porous material, known as Darcy resistance. The inner space of the coronary artery generates cholesterol-rich fatty plaques and blood clots that block the artery, simulating the diseased condition of blood circulation in this study. We employ a set of non-dimensional variables to convert the governing equations of the current flow into dimensionless partial differential equations. Analytical methods have derived a solution for the studied problem. The discovery is pertinent to the natural circulation of blood through coronary arteries, which are highly porous. A particular artery pathology creates a permeable structure within the arterial lumen. The current study demonstrates that blood flow may be manipulated by adjusting the intensity of the external magnetic field, while the temperature of the blood can be managed by either increasing or decreasing its thermal conductivity. The graphical representation demonstrates the impact of different physical parameters on velocity, temperature, and concentration profiles. The significant results of the current studies are that, the fluid velocity diminishes with rising magnetic and Biot numbers but exhibits an increase when considering the Darcy number and Hall parameter. There is a gentle increase in the wall shear stress as the Casson parameter (β) increases from 0.1 to 0.3. For β = 0.3, the percentage change along the axial direction (x) is more pronounced. This is because the wall shear stress is proportional to the number of Casson parameters.
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来源期刊
International Journal of Thermofluids
International Journal of Thermofluids Engineering-Mechanical Engineering
CiteScore
10.10
自引率
0.00%
发文量
111
审稿时长
66 days
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