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首页> 外文期刊>Heat transfer >Unsteady bioconvection Darcy-Forchheimer nanofluid flow through a horizontal channel with impact of magnetic field and thermal radiation
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Unsteady bioconvection Darcy-Forchheimer nanofluid flow through a horizontal channel with impact of magnetic field and thermal radiation

机译：不稳定的生物保护达西 - 前辈纳米流体通过水平通道流过磁场影响和热辐射

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Unsteady bioconvection Darcy-Forchhiemer nanofluid flow is considered in the current investigation in the presence of micro-organisms. The flow is exposed to thermal radiation and a uniform magnetic field in a horizontal channel. The impacts of Brownian motion and thermophoresis are also considered for the flow problem. The unsteady governing equations are modeled and transformed into a nondimensional form by employing a suitable group of similar variables. The solution of the modeled equations is determined by the semianalytical method homotopy analysis method. The features of flow characteristics such as temperature, concentration, velocity, and the motile micro-organism distributions in response to the variations of the emerging parameters are simulated and examined in detail. Among the many results of the study, it is found that velocity upsurges with rising values of the unsteadiness parameter while declining with growth in the magnetic, inertial, and porosity parameters. Temperature augments with growing estimations of Brownian, unsteadiness, and radiation parameters and declines with enhancing values of Prandtl number. Amassed estimations of the Brownian factor reduce the concentration of nanoparticles while growing values of thermophoresis, unsteadiness parameters, and Schmidt number increase it. Moreover, the motile micro-organism profile is a reducing function of the bioconvection Lewis numbers, Peclet, and bioconvection concentration difference parameter.
机译：在微生物存在的情况下，考虑了在目前的研究中考虑了不稳定的Bioconvection Darce-Forchhiemer纳米流体流。流动暴露于水平通道中的热辐射和均匀磁场。褐色运动和耐热化的影响也被认为是流动问题。通过采用合适的类似变量进行建模并将不稳定的控制方程建模并转化为非潜力形式。建模方程的溶液由半角质方法均匀分析方法确定。诸如温度，浓度，速度和动机微生物分布的流动特性的特征是响应于出现参数的变化而进行的模拟和检查。在该研究的许多结果中，发现速度上升，其具有不稳定参数的上升值，同时随着磁性，惯性和孔隙率参数的生长而下降。温度增强随着褐色，不稳定性和辐射参数的越来越多的估计，并通过增强普朗特数的增强值下降。大使褐色因子的估计降低了纳米颗粒的浓度，同时越来越多的耐热度，不稳定参数和施密特数增加它。此外，动机微生物谱是生物vecence Lewis数，PECLET和生物保护浓度差参数的还原功能。

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