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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Entropy generation on EMHD stagnation point flow of hybrid nanofluid over a stretching sheet: Homotopy perturbation solution
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Entropy generation on EMHD stagnation point flow of hybrid nanofluid over a stretching sheet: Homotopy perturbation solution

机译：拉伸纸张杂交纳米流体杂交纳米流体的EMHD停滞点流动的熵生成：同型扰动溶液

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摘要

The intention of this article is to explore the entropy generation in EMHD hybrid nanofluid on a stagnation point in the presence of slips, heat generation and viscous dissipation. The fluid in the enclosure is water containing hybrid nanoparticles Ag-Cu. Suitable self-similarity variables are employed to transform the nonlinear differential systems into an ordinary differential system, which computed via homotopy perturbation method (HPM). The comparison with the homotopy perturbation method (HPM) gives an accurate and reliable result than the numerical method (Runge-Kutta method). The graphical results are expressed for velocity, temperature, entropy generation, Bejan number, skin friction and Nusselt number with an impact of active parameters. The higher values of electric field enhancing the velocity whereas the opposite nature for a magnetic field parameter. The entropy generation rises for higher values of a magnetic parameter, Eckert number and temperature difference parameter. In the magnetic field and electromagnetic field plays an important role in biomedical applications especially radiofRequency ablation (RFA), magnetic resonance imaging (MRI), cancer therapy, tumor therapy, malaria infection. This theoretical investigation may be profitable in biomedical engineering, especially cardiology, cure of skin disorders and treat tumors in Uterus.
机译：本文的目的是探索在存在滑移、发热和粘性耗散的情况下，EMHD混合纳米流体在驻点上的熵产生。外壳中的流体是含有银铜杂化纳米颗粒的水。采用合适的自相似变量将非线性微分系统转化为常微分系统，并通过同伦摄动法（HPM）进行计算。与同伦摄动法（HPM）相比，数值方法（龙格-库塔法）给出了准确可靠的结果。图形结果表示了速度、温度、熵产、贝扬数、表面摩擦和努塞尔数，以及活动参数的影响。较高的电场值会提高速度，而磁场参数的性质则相反。磁参数、埃克特数和温差参数越大，熵产越大。磁场和电磁场在生物医学应用中发挥着重要作用，尤其是射频消融（RFA）、磁共振成像（MRI）、癌症治疗、肿瘤治疗、疟疾感染。这一理论研究可能对生物医学工程，尤其是心脏病学、皮肤疾病的治疗和子宫肿瘤的治疗有益。

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