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探究 MHD 触变纳米流体在垂直表面上的生物对流流动，其中同时存在纳米颗粒和旋毛虫微生物。

Exploration of bioconvection flow of MHD thixotropic nanofluid past a vertical surface coexisting with both nanoparticles and gyrotactic microorganisms.

机构信息

Department of Mathematical Sciences, Federal University of Technology, Akure, Nigeria.

Department of Mechanical Engineering, Sejong University, Seoul, 05006, Republic of Korea.

出版信息

Sci Rep. 2021 Aug 17;11(1):16627. doi: 10.1038/s41598-021-96185-y.

DOI:10.1038/s41598-021-96185-y
PMID:34404877
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8371174/
Abstract

This communication presents analysis of gravity-driven flow of a thixotropic fluid containing both nanoparticles and gyrotactic microorganisms along a vertical surface. To further describe the transport phenomenon, special cases of active and passive controls of nanoparticles are investigated. The governing partial differential equations of momentum, energy, nanoparticles concentration, and density of gyrotactic microorganisms equations are converted and parameterized into system of ordinary differential equations and the series solutions are obtained through Optimal Homotopy Analysis Method (OHAM). The related important parameters are tested and shown on the velocity, temperature, concentration and density of motile microorganisms profiles. It is observed that for both cases of active and passive control of nanoparticles, incremental values of thermophoretic parameters corresponds to decrease in the velocity distributions and augment the temperature distributions.

摘要

本论文分析了含有纳米颗粒和旋毛虫微生物的触变性流体在垂直表面上的重力驱动流动。为了进一步描述传输现象，研究了纳米颗粒的主动和被动控制的特殊情况。通过最优同伦分析方法（OHAM），将动量、能量、纳米颗粒浓度和旋毛虫微生物密度方程的控制偏微分方程转化并参数化为常微分方程组，并获得了级数解。通过测试相关重要参数，观察到在纳米颗粒的主动和被动控制这两种情况下，热泳参数的增量值对应于速度分布的减小和温度分布的增加。

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