Radiative and MHD Effects on Time-Dependent Thermal-Material Transfer by Micropolar Binary Mixture

IF 1 4区 物理与天体物理 Q3 PHYSICS, MATHEMATICAL
Md. Mosharrof Hossain, R. Nasrin, M. Hasanuzzaman
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引用次数: 2

Abstract

Radiation is an important branch of thermal engineering which includes geophysical thermal insulation, ground water pollution, food processing, cooling of electronic components, oil recovery processes etc. An analysis of unsteady magneto-convective heat-mass transport by micropolar binary mixture of fluid passing a continuous permeable surface with thermal radiation effect has been introduced in this paper. The governing equations are transformed into coupled ordinary differential equations along with Boussinesq approximation by imposing the similarity analysis. Applying the shooting technique, the obtained non-linear coupled similarity equations are solved numerically with the help of “ODE45 MATLAB” software. The results of the numerical solutions to the problem involving velocity, temperature, concentration and micro-rotation are presented graphically for different dimensionless parameters and numbers encountered. With an increase of suction parameter, the velocity distributions very closed to the inclined permeable wall decrease slightly where 0 ≤ η ≤ 0.3 . But for the uplifting values of sunction, both micro-rotation profile and species concentration enhance through the boundary layer. The skin-friction coefficient increases about 61%, 13%, 27% for rising values of Prandtl number (0.71-7), radiation effect (0 - 1) and thermal Grashof number (5-10), respectively, but an adverse effect is observed for magnetic field (1 - 4), inclined angle 0 0 − 60 0 and Schmidt number (0.22 - 0.75). Heat transfer and mass transfer reduce about 82%, 53%, respectively, in increasing of Pr (0.71-1) and 36%, 11%, respectively, in increasing of thermal radiation (0 - 1). The surface couple stress increases about 26%, 49%, 64% and 30% with the increasing values of magnetic field (1-4), inclination angle 0 0 − 60 0 , suction (0-1) and Schmidt number (0.22-0.75), respectively. Finally, the present study has been compared with the earlier published results. It is observed that the comparison bears a good agreement.
微极性二元混合物随时间变化的热材料传递的辐射和MHD效应
辐射是热能工程的一个重要分支,包括地球物理隔热、地下水污染、食品加工、电子元件冷却、采油工艺等。本文分析了具有热辐射效应的微极二元流体混合物通过连续渗透表面的非定常磁对流热质传输。通过相似性分析,将控制方程与Boussinesq近似转化为耦合常微分方程。应用射击技术,利用“ODE45MATLAB”软件对得到的非线性耦合相似方程进行了数值求解。对于遇到的不同无量纲参数和数值,用图形表示了速度、温度、浓度和微旋转问题的数值解的结果。随着吸力参数的增加,在0≤η≤0.3时,非常靠近倾斜渗透壁的速度分布略有减小。但对于太阳活动的抬升值,微旋剖面和物种浓度都通过边界层增强。普朗特数(0.71-7)、辐射效应(0-1)和热格拉绍夫数(5-10)的增加分别使皮肤摩擦系数增加约61%、13%和27%,但磁场(1-4)、倾角0 0−60 0和施密特数(0.22-0.75)则产生不利影响。传热和传质分别减少约82%、53%,Pr(0.71-1)的增加和热辐射(0-1)的增加分别为36%和11%。随着磁场(1-4)、倾角0−60 0、吸力(0-1)和施密特数(0.22-0.75)的增加,表面耦合应力分别增加约26%、49%、64%和30%。最后,将本研究与先前发表的结果进行了比较。据观察,这种比较结果是一致的。
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来源期刊
Advances in Mathematical Physics
Advances in Mathematical Physics 数学-应用数学
CiteScore
2.40
自引率
8.30%
发文量
151
审稿时长
>12 weeks
期刊介绍: Advances in Mathematical Physics publishes papers that seek to understand mathematical basis of physical phenomena, and solve problems in physics via mathematical approaches. The journal welcomes submissions from mathematical physicists, theoretical physicists, and mathematicians alike. As well as original research, Advances in Mathematical Physics also publishes focused review articles that examine the state of the art, identify emerging trends, and suggest future directions for developing fields.
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