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首页> 外文期刊>Proceedings of the institution of mechanical engineers >Unsteady three-dimensional stagnation point magnetohydrodynamic flow of bionanofluid with variable properties
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Unsteady three-dimensional stagnation point magnetohydrodynamic flow of bionanofluid with variable properties

机译：具有可变特性的生物纳米流体的非定常三维滞止点磁流体动力流

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摘要

Unsteady three-dimensional laminar stagnation point forced convective boundary layer magnetohydrodynamic flow of a bionanofluid with variable transport properties is studied theoretically and numerically. Thermal convective and zero mass flux boundary conditions are incorporated in this study. The transport properties are assumed to be a function of nanoparticle volume fraction to get physically realistic results. The dimensional boundary layer equations along with the coupled boundary conditions are transformed via similarity transformations into a system of ordinary differential equations. The transformed equations are solved numerically using the Runge–Kutta–Fehlberg fourth-, fifth-order numerical method. The effect of selected governing parameters, namely, viscosity, thermal conductive, mass diffusivity, microorganism diffusivity, magnetic field and bioconvection Schmidt number, on the dimensionless velocity, temperature, nanoparticle volume fraction, microorganism, skin friction coefficient, heat transfer rate, mass transfer rate and microorganism transfer rate, is illustrated graphically and interpreted in detail. Comparisons with previous works are carried out for some limiting cases and found to be in good agreement.
机译：从理论上和数值上研究了具有可变输运特性的仿生流体的非定常三维层流停滞点强迫对流边界层的磁流体动力学流动。热对流和零质量通量边界条件被纳入本研究。为了获得物理上真实的结果，假定传输性质是纳米颗粒体积分数的函数。尺寸边界层方程以及耦合的边界条件通过相似性变换转换为常微分方程组。使用Runge–Kutta–Fehlberg四阶，五阶数值方法对变换后的方程进行数值求解。选定的控制参数，即粘度，导热性，质量扩散率，微生物扩散率，磁场和生物对流施密特数，对无量纲速度，温度，纳米颗粒体积分数，微生物，皮肤摩擦系数，传热速率，传质的影响图解说明并详细解释了微生物的速率和微生物转移速率。与先前的工作进行了比较，发现存在一些局限性。

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