Hussain Mazhar, Rasool Mudassar, Mehmood Ahmer
Department of Sciences and Humaities, National University of Computer and Emerging Sciences, Lahore, 54770, Pakistan.
Department of Mathematics and Statistics, International Islamic University, Islamabad, 4400, Pakistan.
Sci Rep. 2022 Jun 30;12(1):11038. doi: 10.1038/s41598-022-15159-w.
In present years, the study of nanofluids has emerged as a hot topic among the researchers, because the nanoparticle contained in the fluids significantly enhances the heat transfer properties of the fluids. Particularly, rotating ows are of vital importance due to their wide range of scientific, engineering applications, such as jet engines, pumps and vacuum cleaners, as well as geophysical ows. In this study water based nanofluid over radially stretchable rotating disk in the presence of radiation heat transfer is considered. The surface of the stretchable rotating disk surface allows the impact of continuous suction and admits the generalized slip. The Tiwari and Das model is used to describe the nanouid behavior (Tiwari and Das in Int J Heat Mass Transf 50(9-10):2002-2018, 2007). Three types of nanoparticles: Copper (Cu), silver (Ag) and titanium dioxide [Formula: see text] are taken into account. By choosing an appropriate set of similarity transformations, the boundary layer momentum equations and energy equation are transformed to set of nonlinear ordinary differential equations. The impact of emerging quantities like, nanoparticle concentration [Formula: see text], suction parameter [Formula: see text], slip parameters [Formula: see text], critical shear stress parameter [Formula: see text], and radiation parameter [Formula: see text], are illustrated through several graphs and tables. The Nusselt number and skin friction coefficient are also calculated to analyze the heat transfer process.
近年来,纳米流体的研究已成为研究人员中的热门话题,因为流体中所含的纳米颗粒显著增强了流体的传热特性。特别是,旋转流动由于其在广泛的科学、工程应用中具有至关重要的意义,例如喷气发动机、泵和真空吸尘器,以及地球物理流动。在本研究中,考虑了存在辐射传热时在径向可拉伸旋转圆盘上的水基纳米流体。可拉伸旋转圆盘表面允许连续抽吸的影响并允许广义滑移。采用蒂瓦里和达斯模型来描述纳米流体的行为(蒂瓦里和达斯,《国际热质传递杂志》50(9 - 10):2002 - 2018,2007)。考虑了三种类型的纳米颗粒:铜(Cu)、银(Ag)和二氧化钛[公式:见原文]。通过选择一组合适的相似变换,将边界层动量方程和能量方程转换为一组非线性常微分方程。通过若干图表展示了诸如纳米颗粒浓度[公式:见原文]、抽吸参数[公式:见原文]、滑移参数[公式:见原文]、临界剪切应力参数[公式:见原文]和辐射参数[公式:见原文]等新出现量的影响。还计算了努塞尔数和表面摩擦系数以分析传热过程。