Open AccessHeat Transfer and Fluid Flow Over a Bank of Circular Tubes Heat Exchanger Using Nanofluids: CFD Simulation
Author(s) -
Mohammed Saad Kamel,
Sherwan Mohammed Najm
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/928/2/022017
Subject(s) - nanofluid , materials science , heat transfer , turbulence , heat transfer coefficient , heat exchanger , reynolds number , computational fluid dynamics , mechanics , thermodynamics , fluid dynamics , heat transfer enhancement , fluent , physics
In the present work, the influence of the basefluids and nanoparticle types on the fluid flow and the heat transfer behavior were studied. Numerical investigation has been done over a bank of tubes heat exchanger in a triangular arrangement. Turbulent forced convection of Al 2 O 3 and SiO 2 nanoparticles-based water and glycerin nanofluids was predicted, spherical nanoparticles with a diameter of 30 nm and a volume fraction of 3% were assumed in this simulation. Commercial software so called Ansys fluent used as a computational fluid dynamics code to solve steady (2-D) Navier-Stokes and energy equations adopting finite volume techniques. The k-ε model was used to modelling the effect of turbulent. The obtained results demonstrated that the heat transfer for SiO 2 nanoparticles based deionized water nanofluids was higher than the other types of nanofluids, which means that this working fluid could be promising cooling liquid in many heat exchange systems. The friction coefficient for all nanofluids reduced with increasing Reynolds number for all tubes. Furthermore, the results showed that the heat transfer enhancement increased with increasing the Reynolds number in all nanofluids with constant volume concentration and nanoparticles size.