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Radiative heat transfer in Homann stagnation-point flow of hybrid nanofluid
Applied Nanoscience ( IF 3.869 ) Pub Date : 2020-07-06 , DOI: 10.1007/s13204-020-01464-1
Jawad Ahmed , Azeem Shahzad , Aamir Farooq , Muhammad Kamran , Salah Ud-Din Khan , Shahab Ud-Din Khan

In this paper, we study the heat transfer for \(({\text {Al}}_{{2}}{\text {O}}_{{3}} -{\text {Cu}}/{\text {water}})\) hybrid nanofluid in non-axisymmetric Homann stagnation region by adopting the Tiwari and Das model in the presence of magnetic flux. The importance of nanoparticle shape factor, i.e., cylinder, blades, bricks, and platelets has been studied under the time-independent free stream. Further, the impact of non-linear thermal radiations on the heat transfer process is investigated. The resulting equations representing the physical problem are transformed by adopting the proper variables. Through asymptotic approach, the resultant problem is scrutinized for large-\(\gamma\) (shear-to-strain-rate ratio) through bvp4c technique in MATLAB. The impression of significant parameters for both single nanoparticle and hybrid nanofluid on the flow field, temperature, skin friction and local Nusselt number is reported through tabular and graphical depictions. It is noted that the fluid temperature in the hybrid phase has always been greater than the nanophase.



中文翻译:

混合纳米流体霍曼停滞点流的辐射传热

在本文中,我们研究了\(({{text {Al}} _ {{2}} {\ text {O}} _ {{3}}-{\ text {Cu}} / {\文本{water}})\)通过在存在磁通量的情况下采用Tiwari和Das模型在非轴对称Homann停滞区域中混合纳米流体。在与时间无关的自由流下,已经研究了纳米颗粒形状因子(即圆柱体,叶片,砖块和血小板)的重要性。此外,研究了非线性热辐射对传热过程的影响。通过采用适当的变量可以对表示物理问题的方程进行转换。通过渐近方法,对结果大的\(\ gamma \)进行仔细研究(剪切应变率比)通过MATLAB中的bvp4c技术获得。通过表格和图形描述报告了单个纳米颗粒和混合纳米流体的重要参数对流场,温度,皮肤摩擦和局部Nusselt数的印象。要注意的是,混合相中的流体温度始终高于纳米相。

更新日期:2020-07-06
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