Heat and mass transfer investigation of unsteady magnetohydro dynamic nanofluid flow in a porous pipe in the presence of chemical reactions

Abdalla Zahor Feda, Omar Ali Ahmada, Jain Reema, Grace Masanja Verdiana
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Abstract

This article presents a numerical investigation of mass and heat transfer effects on an unsteady Magnetohydrodynamic (MHD) nanofluid flow in a permeable pipe. The influences of the chemical reaction and magnetic flux are considered. With the central finite-difference technique, the fundamental equations are discretized. The resulting equations are solved numerically using methods of lines, bvp4, and shooting methods. The influences of material factors on the solution are investigated and displayed through tabular and graphical illustrations. The study revealed that the Sherwood number, skin friction, and rate of heat transfer are all decreased by an increase in the magnetic field. Additionally, the rate of rise of the chemical reaction and Brownian motion is observed to reduce the concentration of the nanofluid. Furthermore, the study finds that the Soret number, porosity medium resistance parameter, and thermophoresis parameter all cause the concentration profile to climb; while, increasing the pace of the chemical reaction and brown mobility leads the profile to decline. Key words: Chemical reaction, porous medium, magnetohydrodynamic (MHD, nanofluid.
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存在化学反应的非定常磁流体动力纳米流体在多孔管内流动的传热传质研究
本文用数值方法研究了非定常磁流体(MHD)纳米流体在可渗透管道中的质量和传热效应。考虑了化学反应和磁通量的影响。利用中心有限差分技术对基本方程进行离散化。利用直线法、bvp4法和射击法对所得方程进行了数值求解。研究了材料因素对溶液的影响,并通过表格和图解进行了展示。研究表明,随着磁场的增大,舍伍德数、表面摩擦和换热率均降低。此外,观察到化学反应和布朗运动的上升速率降低了纳米流体的浓度。此外,研究发现Soret数、孔隙介质阻力参数和热泳参数均导致浓度曲线升高;然而,增加化学反应的速度和褐色迁移率会导致剖面下降。关键词:化学反应,多孔介质,磁流体力学,纳米流体
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