Heat transfer enhancement in hydromagnetic alumina–copper/water hybrid nanofluid flow over a stretching cylinder

• Published in: Journal of thermal analysis and calorimetry 2019-10, Vol.138 (2), p.1127-1136
• Main Authors: Maskeen, Muhammad Muddassar, Zeeshan, Ahmad, Mehmood, Obaid Ullah, Hassan, Mohsan
• Format: Article
• Language: English
• Subjects: Aluminum oxide; Analytical Chemistry; Boundary layers; Boussinesq approximation; Chemistry; Chemistry and Materials Science; Coefficient of friction; Computational fluid dynamics; Convective heat transfer; Copper; Cylinders; Flow characteristics; Fluid flow; Heat transfer; Heat transfer coefficients; Inorganic Chemistry; Magnetic fields; Measurement Science and Instrumentation; Nanofluids; Nanoparticles; Nonlinear differential equations; Nonlinear equations; Ordinary differential equations; Physical Chemistry; Polymer Sciences; Radiation; Skin friction; Stretching; Thermal radiation
• ISSN: 1388-6150; 1588-2926
• DOI: 10.1007/s10973-019-08304-7

In the current study, heat transfer performances and flow characteristics of alumina–copper/water (Al 2 O 3 –Cu/H 2 O) hybrid nanofluid over a stretching cylinder are explored under the influence of Lorentz magnetic forces and thermal radiation. The Roseland’s flux model is employed for the impact of thermal radiations. The governing flow problem comprises of nonlinear ordinary differential equations, which are transformed into nondimensional form via suitable similarity transforms, Boussinesq and boundary layer approximations. Results of heat and fluid flow as well as convective heat transfer coefficient and skin friction coefficient under influence of embedding parameters are displayed and discussed through tables and graphs. To check its heat transfer performance, a comparison of hybrid nanofluid with base fluid and single material nanofluids is also made and found that hybrid nanofluids are more effective in heat transfer than conventional fluids or single nanoparticles-based nanofluids.