MHD boundary layer analysis for micropolar dusty fluid containing Hybrid nanoparticles (Cu‑Al2O3) over a porous medium

• Published in: Journal of molecular liquids Vol. 268; pp. 813 - 823
• Main Authors: Ghadikolaei, S.S., Hosseinzadeh, Kh, Hatami, M., Ganji, D.D.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.10.2018
• Subjects: Heat transfer; Hybrid nanoparticles; MHD; Nanoparticles shape factor; Nusselt number; MHD; Nanoparticles shape factor; Hybrid nanoparticles; Nusselt number; Heat transfer
• ISSN: 0167-7322; 1873-3166
• DOI: 10.1016/j.molliq.2018.07.105

One of the modern methods to increase heat transfer in fluids is the use of Hybrid nanoparticles instead of nanoparticle. Therefore, in this paper mahnetohydrodynamic (MHD) flow and heat transfer of non-Newtonian micropolar dusty fluid suspended Cu-Al2O3 Hybrid nanoparticles past a stretching sheet in the presence of non-linear thermal radiation, variable thermal conductivity and different nanoparticles shapes (Bricks, Cylinders, Platelets and Blades) are investigated. H2O is used as a base fluid. The governing equations have been solved with Runge-Kutta Fehlberg numerical method. The impact of different parameters on the profiles of velocity and temperature in prescribe heat flux (PHF case) and prescribe surface temperature (PST case) is analyzed. Hartman number enhancement has led to the velocity reduction due to the Lorentz force. The temperature has also been increased as a result of Hartman number enhancement because of the Joule heating effect. The rise in the amount of shape factors has caused increases the thickness of thermal boundary layer and local Nusselt number in (PHF case). •Micropolar dusty fluid by Hybrid nanoparticles (Cu-Al2O3) is modeled.•Influence of nanoparticle shape factor in a porous medium is investigated.•Joule heating effect on permeable stretching sheet is considered.•The numerical method is employed to solving the nonlinear equations.