Purpose

This paper aims to focus on the natural convective flow analysis of micropolar nanofluid fluid in a rectangular vertical container. A heated source is placed in the lower wall to generate the internal flow. In further assumptions, the left/right wall are kept cool, while the upper and lower remaining portions are insulated. Free convection prevails in the regime because of thermal difference in-between the lower warmer and upper colder region.

Design/methodology/approach

The physical setup owns mathematical framework in-terms of non-linear partial differential equations. For the solution purpose of the differential system, finite volume method is adopted. The interesting features of the flow along with thermal transportation involve both translational and rotational movement of fluid particles.

Findings

Performing the simulations towards flow controlling variables the outputs are put together in contour maps and line graphs. It is indicated that the variations in flow profile mass concentration and temperature field augments at higher Rayleigh parameter because of stronger buoyancy effects. Higher viscosity coefficient implies decrease in flow and thermal transportation. Further, the average heat transfer rate also grows by increasing both the Rayleigh parameter and heated source length.

Originality/value

To the best of the authors’ knowledge, no such study has been addressed yet. Further, the results are validated by comparing with previously published work.

中文翻译：

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腔内装有微极纳米流体的自然对流驱动流动的模拟

目的

本文旨在重点研究矩形垂直容器中微极纳米流体的自然对流流动分析。加热源放置在下壁中以产生内部流动。在进一步的假设中，左/右壁保持凉爽，而上部和下部剩余部分是隔热的。由于下部较暖区域和上部较冷区域之间存在热差，因此该区域内普遍存在自由对流。

设计/方法/方法

物理设置拥有非线性偏微分方程的数学框架。为了求解微分系统，采用有限体积法。流动和热传输的有趣特征涉及流体粒子的平移和旋转运动。

发现

对流量控制变量进行模拟，输出被放在等高线图和折线图中。结果表明，由于较强的浮力效应，流动剖面质量浓度和温度场的变化在较高的瑞利参数下增加。较高的粘度系数意味着流动和热传输的减少。此外，平均传热率也随着瑞利参数和热源长度的增加而增加。

原创性/价值

据作者所知，尚未涉及此类研究。此外，通过与以前发表的工作进行比较来验证结果。