Abstract

This study investigates the mixed convection heat transfer characteristics of micropolar nanofluid containing motile microorganisms as it is passing over a stretching sheet. The governing equations of the fluid flow and boundary conditions are solved via similarity analysis using the fourth-order Runge–Kutta method. To verify the accuracy and validity of the method, the results are compared with those of several previous studies. The results are presented in terms of distribution of the velocity, particle micro-rotation, temperature, nanoparticle concentration, and density of motile microorganisms over the stretching sheet. The skin friction, coupled stress, mass transfer rate, and the rate of microorganism transfer away from the sheet are also examined. It can be concluded that the Nusselt number, coupled stress, friction coefficient, and Sherwood number are independent of the bioconvection Lewis number Lb. On the other hand, the rate of motile microorganism transfer away from the sheet to the fluid increases with Lb.

中文翻译：

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包含运动性微生物的微极性纳米流体的磁流体动力学流通过垂直拉伸片，具有磁场相关的粘度

摘要

这项研究调查了包含运动微生物的微极性纳米流体通过拉伸片时的混合对流传热特性。使用四阶Runge–Kutta方法通过相似性分析来求解流体流动和边界条件的控制方程。为了验证该方法的准确性和有效性，将结果与先前的一些研究进行了比较。结果以拉伸片上的速度，颗粒微旋转，温度，纳米颗粒浓度和运动微生物的密度的分布表示。还检查了皮肤摩擦，耦合应力，传质速率和微生物从片材上转移的速率。可以得出结论，努塞尔数，耦合应力，摩擦系数，磅。另一方面，运动微生物从薄板转移到流体的速率随Lb的增加而增加。