Hydromagnetic Boundary Layer Flow and Heat Transfer Characteristics of a Nanofluid over an Inclined Stretching Surface in the Presence of a Convective Surface: A Comprehensive Study

Abstract

In this paper we investigate numerically the hydromagnetic boundary layer flow and heat transfer characteristics of a nanofluid using three types of nanoparticles (copper, aluminium oxide and titanium dioxide) having various shapes (spherical, cylindrical, arbitrary, etc) by considering three kinds of base fluids (water, ethylene glycol and engine oil) over a nonlinear inclined stretching surface, taking into account the effect of convective surface condition. Using similarity transformations, the governing nonlinear partial differential equations of the physical model are transformed into non-dimensional ordinary differential equations which are solved for local similar solutions using the very robust computer algebra software, Maple 13. The numerical simulation is carried out to investigate the role of the pertinent parameters on the flow and temperature fields as well as on the rate of heat transfer and on the rate of shear stress. The results show that the addition of nanoparticles to the base fluid may not always increase the rate of heat transfer. It depends significantly on the surface convection, type of base fluid and nanoparticles. The finding of this study will open a gate for better understanding of nanofluid characteristics.

Boundary Layer Flow and Heat Transfer of Carbon Nanotubes over a Moving Surface in Presence of Hydromagnetic

“…The study conducted by Rajesh Kumar et al (2002) focused on investigating hydromagnetic convection over a vertically moving surface with uniform suction. Rahman and Al-Hatmi (2014) were investigated the hydromagnetic boundary layer flow and heat transfer characteristics of a nanofluid over a nonlinear inclined stretching surface by considering the effect of convective surface condition. They considered three types of nanoparticles namely copper, aluminium oxide and titanium dioxide and having various shapes such as spherical, cylindrical, arbitrary.…”

Mathematical modeling of unsteady flow with uniform/non-uniform temperature and magnetic intensity in a half-moon shaped domain

“…Malvandi et al [21] performed the convective temperature transport within an annulus using Al 2 O 2 -water nanofluid. Rahman and Al-Hatmi [22] investigated a comprehensive study about the characteristics of magneto-hydrodynamics temperature flow. The results showed that the heat transfer rate is higher in TiO 2 -water nanofluid compared to the heat transfer rate in Al 2 O 3 -water and Cu-water nanofluids.…”

Oblique stagnation-point flow of a nanofluid past a shrinking sheet

“…(see Das et al, 2008;Wong and Leon, 2010) many researchers have studied nanofluid flows on various geometries. Some of them are Buongiorno (2006), Tiwari and Das (2007), Abu-Nada (2008), Abu-Nada and Oztop (2009), Bachok et al (2010), Khan and Pop (2010), Makinde and Aziz (2011), Ahmad and Pop (2010), Grosan and Pop (2011), Rahman and Aziz (2012), Rahman and Eltayeb (2013), Rahman et al ( , 2014aRahman et al ( , b, 2015, Rahman and Al-Hatmi (2014), Sheremet et al (2015), Kuznetsov (2009a, b, 2011), Kuznetsov and Nield (2010a, b, c), Nield (2011a, b, c, 2013) and Mustafa et al (2013) are worth mentionning. It is worth mentioning that references on nanofluids can be found in the book by Nield and Bejan (2013), and in the review papers by Wang and Mujumdar (2008), Kakaç and Pramuanjaroenkij (2009), Lee et al (2010), Eapen et al (2010), Fan and Wang (2011), Mahian et al (2013) and several others.…”