Numerical Investigation for Convective Heat Transfer of CNT Nano-Fluids over a Stretching Surface

• Published in: Materials science forum Vol. 961; pp. 148 - 155
• Main Authors: Kandasamy, R., Sufahani, Suliadi Firdaus, Karim, Fazlul, Sabirin, Muhamad, Ismoen, Muhaimin, Mohamad, Radiah Bte
• Format: Journal Article
• Language: English
• Published: Pfaffikon Trans Tech Publications Ltd 01.07.2019
• Subjects: Carbon nanotubes; Computational fluid dynamics; Convective heat transfer; Ethylene glycol; Heat conductivity; Indoor environments; Mathematical analysis; Mechanical systems; Nanofluids; Nonlinear differential equations; Nonlinear equations; Ordinary differential equations; Runge-Kutta method; Stretching; Thermal conductivity; Thermal stratification; Ventilation; Viscosity; Carbon Nanotubes; Thermal Conductivity; Convection; Nanofluids
• ISSN: 0255-5476; 1662-9752; 1662-9752
• DOI: 10.4028/www.scientific.net/MSF.961.148

The performance of carbon nanotube (CNT) nanofluids on convective heat transfer over a stretching sheet was investigated under thermal stratification and magnetic field effects. Water, engine oil and ethylene glycol are used as the base fluids. The governing equations are transformed into a system of coupled nonlinear ordinary differential equations using similarity transformations and solved numerically using the fourth-order Runge–Kutta–Fehlberg in conjunction to shooting method. The CNT nanofluids with an engine oil base fluid shows the highest thermal conductivity in comparison to ethylene glycol and water, respectively. Potential application of the thermal conductivity enhancement of CNT nanofluid is to increase the energy-efficient mechanical systems in heating, cooling and ventilation of the indoor environment.