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Proceedings of the 25th National and 3rd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2019)

ISBN Druckformat: 978-1-56700-497-7 (Flash Drive)
ISBN Online: 978-1-56700-496-0

Numerical Study on Thermal Performance of Functionalized Graphene − Ethylene glycol/Water Nanofluid in Mini-channel Heat Sink

DOI: 10.1615/IHMTC-2019.1280
pages 763-768

Babu Rao Ponangi
PMR Lab, Department of Mechanical Engineering, PES University, Bengaluru – 560085, India; Department of Mechanical Engineering, PES University, Bengaluru – 560085, India

B M Sakshi
Department of Mechanical Engineering, PES University, Bengaluru 560085, India

Charan R S
Department of Mechanical Engineering, PES University, Bengaluru 560085, India

Nand Dave
Department of Mechanical Engineering, PES University, Bengaluru 560085, India

V. Krishna
PMR Lab, Department of Mechanical Engineering, PES University, Bengaluru – 560085, India

Abstrakt

In the present work, numerical analysis of a single mini channel heat sink using nanofluid instead of water as the coolant is studied. The mini-channel heat sink considered is made of copper having a length of 50 mm and the cross-section area of the fluid domain is 1 × 1.5 mm. This model is taken into consideration for a simple, less time consuming and detailed analysis. The study is carried out using Functionalized Graphene suspended in 50:50 ethylene glycol and water as the base fluid at five different concentrations of 0.5, 1, 1.5, 2, 2.5 vol%. The inlet temperature of the nanofluid is maintained at three different temperatures of 20°C, 30°C and 40°C. The heat flux of the bottom wall is varied from 105 to 106 W/m2 and the remaining three walls are made adiabatic. The model is meshed in ANSYS workbench module R18.1, analysed in ANSYS Fluent R18.1 and results are obtained in CFD post. A parametric study is performed to investigate the effect of the change in velocity, inlet temperature and heat flux of the coolant on the performance parameters that is outlet temperature and pressure drop. Results show that use of nanofluids instead of water does not improve the performance of the heat sinks at low Reynolds number.