A mixed convection flow and heat transfer of pseudo-plastic power law nanofluids past a stretching vertical plate. (February 2017)

• Record Type: Journal Article
• Authors: Si, Xinhui; Li, Haozhe; Zheng, Liancun; Shen, Yanan; Zhang, Xinxin
• Is Part Of: International journal of heat and mass transfer. Volume 105(2017:Feb.)
• Page Start: 350
• Page End: 358
• Publication Date: 2017-02
• Subjects: Power law nanofluids -- Dual solutions -- Stability -- Bvp4c; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Electronic journals; 621.4022
• DOI: 10.1016/j.ijheatmasstransfer.2016.09.106
• Languages: English
• ISSNs: 0017-9310

Abstract

Highlights: The variable thermal conductivity dependent on the gradient of velocity and nanoparticle property is considered. The similarity equations are solved numerically and dual solutions are obtained. The stability of the numerical solutions is analyzed. Abstract: A mixed convection flow and heat transfer of pseudo-plastic power law nanofluid past a stretching vertical plate is investigated. Three types of nano-particles, such as copper (Cu), aluminum oxide (Al2 O3 ) and titanium oxide (TiO2 ), are considered. The generalized Fourier law proposed by Zheng for varying thermal conductivity of nanofluids, which is dependent on the power law of velocity gradient as well as the nano-particles property, is taken into account. Dual solutions are obtained by Bvp4c with Matlab. The stability of the solution also is discussed by introducing the unsteady governing equations. Furthermore, a new interesting phenomenon is found: the local Nusselt number do not maintain the similar characteristics of Newtonian fluid near the point where the velocity ratio is equal to 0.5.