Experimental Investigation of Nanofluid Turbulent Flow over Microscale Backward-Facing Step

Abd. Rahim Abu Talib; Sadeq Salman; Muhammad Fitri Mohd Zulkeple; Ali Kareem Hilo

doi:10.37934/arfmts.99.2.119134

Authors

Abd. Rahim Abu Talib Aerospace Malaysia Research Centre, Faculty of Engineering, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
Sadeq Salman Scientific Research Center, Al-Ayen University, Nasiriyah, Iraq
Muhammad Fitri Mohd Zulkeple Aerodynamic, Heat Transfer & Propulsion Group, Department of Aerospace Engineering, Universiti Putra Malaysia, 43400 Serdang, Selangor Malaysia
Ali Kareem Hilo Department of Naval Architecture and Ocean Engineering, Chungnam National University, Daejon 34134, South Korea

DOI:

https://doi.org/10.37934/arfmts.99.2.119134

Keywords:

Microscale, backward-facing step, heat transfer, turbulent flow, nanofluid

Abstract

Experimental research was presented in this paper to illustrate the heat transmission and flow characteristics of nanofluid on a microscale backward-facing step channel. Except for the downstream wall, which was applied with uniform heat flow, the channel side walls were deemed adiabatic. Water was used as the base fluid and mixed with 30 nm diameter CuO nanoparticles with a volume fraction in the range of 0-0.04. The experiment was conducted at a Reynolds number range of 5,000–10,000. The results showed that the Nusselt number increases as the volume fraction increases. However, the increase in the nanoparticle volume fraction leads to an increment in the friction factor. Furthermore, the results indicated that increasing the Reynolds number lead to the volume fraction decreasing. It was found that there is an improvement of heat transfer by applying the CuO/water nanofluid with a 0.03 volume fraction of CuO nanoparticles with a significant performance evaluation criterion (PEC>1).