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Computational analysis of bioconvective flow of nanofluid containing gyrotactic microorganisms over a nonlinear stretching sheet with variable viscosity using HAM
Journal of Computational Design and Engineering ( IF 4.9 ) Pub Date : 2020-03-30 , DOI: 10.1093/jcde/qwaa021
Surya Kanta Mondal 1 , Dulal Pal 2
Affiliation  

This paper is concerned with the investigation of variable viscosity bioconvection flow of nanofluid containing motile gyrotactic microorganisms over a nonlinear stretching sheet in the presence of nonlinear thermal radiation, chemical reaction, internal heat source, and suction/injection effects. The homotopy analysis method has been developed for solving the governing nonlinear differential equations of the boundary layer flow of nanofluid over a stretching sheet. The scaling group transformation (a special form of Lie group transformation) has been applied to find the similarity variable |$\eta $|⁠. Figures are drawn by using Mathematica software to analyze the results that correspond to some important physical parameters and bioconvection parameters on velocity, temperature, nanoparticle concentration, and density of gyrotactic microorganisms. It is found that the influence of variable viscosity on velocity profiles showed that there is an increase in the velocity profiles of nanofluid and the reverse effect is observed on its temperature distribution. It is seen that the thermal radiation parameter increases the temperature distribution, whereas it decreases the nanoparticle concentration distribution. It is also found that the inverse Darcy number reduces the velocity profile, whereas it enhances the temperature distribution. This work may find applications in advanced nanomechanical bioconvection energy conversion devices, bio-nanocoolant systems, etc.

中文翻译:

使用HAM的可变粘度非线性拉伸片上的含旋流微生物的纳米流体生物对流的计算分析。

本文涉及在非线性热辐射,化学反应,内部热源和抽吸/注入效应存在的情况下,在非线性拉伸片材上研究的含有运动流体回旋微生物的纳米流体的可变粘度生物对流。为了解决纳米流体在拉伸片材上的边界层流动的控制非线性微分方程,已经开发出了同质分析方法。已应用缩放组变换(Lie组变换的一种特殊形式)来查找相似性变量| $ \ eta $ |⁠。使用Mathematica软件绘制的图形分析了与某些重要物理参数和生物对流参数对应的结果,这些参数涉及回旋微生物的速度,温度,纳米颗粒浓度和密度。发现可变粘度对速度分布的影响表明,纳米流体的速度分布有所增加,并且观察到其温度分布具有相反的影响。可以看出,热辐射参数增加了温度分布,而减小了纳米颗粒浓度分布。还发现反达西数减少了速度分布,而增加了温度分布。这项工作可能会在先进的纳米机械生物对流能量转换设备中找到应用,
更新日期:2020-03-30
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