Open AccessNumerical Modelling of Fluid Flow and Heat Transfer of (TiO2-Water) Nanofluids in Wavy duct
Author(s) -
Safaa A. Ghadhban,
Salah H. Abid Aun,
Kadhum Audaa Jehhef
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/881/1/012162
Subject(s) - nanofluid , materials science , nusselt number , reynolds number , heat transfer , mechanics , pressure drop , thermodynamics , heat transfer enhancement , laminar flow , heat flux , heat transfer coefficient , turbulence , physics
This paper investigates numerically pressure drop and forced convection heat transfer of TiO 2 -water nanofluids laminar flow through a horizontal curvilinear form or wavy duct with using four baffle height ratio h/H=0.15, 0.25, 0.35 and 0.45. This flow has been investigated assuming constant wall heat flux boundary condition by using ANSYS-Fluent with the finite volume method to discretize the nanofluids. The study has aimed to show the possibility of intensification of heat transfer by adding nanoparticles to the main coolant. The model employed in this study is a single phase (homogenous and dispersion). The effects of various factors, such as Reynolds number (Re) and nanoparticle concentration (φ), on the flow field and thermal distribution of the Nanofluids, have been analysed. The present results show that nanoparticle concentration and Reynolds number play a prevalent role in the horizontal wavy duct. The Nusselt number has increased by 54 % when using high nanoparticle concentration of (0.4 vol. %) at high Reynolds number of (1250), also the skin friction factor increased by (32%) in the same conditions. The results provide good predictions to enhancement the heat transfer. Predictably, as nanoparticle volume fraction and/or the Reynolds number increases, the heat transfer increases. However, the flow is accompanied by high friction factor and consequently, higher pressure drop.