Khetib, YacineAbo-Dief, Hala M.Alanazi, Abdullah K.Cheraghian, GoshtaspSajadi, S. MohammadSharifpur, Mohsen2022-08-052022-08-052021-11-10Khetib, Y., Abo-Dief, H.M., Alanazi, A.K., Cheraghian, G., Sajadi, S.M. & Sharifpur, M. (2021) Simulation of Nanofluid Flow in a Micro-Heat Sink With Corrugated Walls Considering the Effect of Nanoparticle Diameter on Heat Sink Efficiency. Frontiers in Energy Research 9:769374. doi: 10.3389/fenrg.2021.769374.2296-598X (online)10.3389/fenrg.2021.769374https://repository.up.ac.za/handle/2263/86726In this numerical work, the cooling performance of water–Al2O3 nanofluid (NF) in a novel microchannel heat sink with wavy walls (WMH-S) is investigated. The focus of this article is on the effect of NP diameter on the cooling efficiency of the heat sink. The heat sink has four inlets and four outlets, and it receives a constant heat flux from the bottom. CATIA and CAMSOL software were used to design the model and simulate the NF flow and heat transfer, respectively. The effects of the Reynolds number (Re) and volume percentage of nanoparticles (Fi) on the outcomes are investigated. One of the most significant results of this work was the reduction in the maximum and average temperatures of the H-S by increasing both the Re and Fi. In addition, the lowest Tmax and pumping power belong to the state of low NP diameter and higher Fi. The addition of nanoparticles reduces the heat sink maximum temperature by 3.8 and 2.5% at the Reynolds numbers of 300 and 1800, respectively. Furthermore, the highest figure of merit (FOM) was approximately 1.25, which occurred at Re 1800 and Fi 5%. Eventually, it was revealed that the best performance of the WMH-S was observed in the case of Re 807.87, volume percentage of 0.0437%, and NP diameter of 20 nm.en© 2021 Khetib, Abo-Dief, Alanazi, Cheraghian, Sajadi and Sharifpur. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY).Heat sinkElectronic componentNanoparticles diameterAlumina–water nanofluidNumerical simulationEngineering, built environment and information technology articles SDG-04SDG-04: Quality educationEngineering, built environment and information technology articles SDG-07SDG-07: Affordable and clean energyEngineering, built environment and information technology articles SDG-09SDG-09: Industry, innovation and infrastructureEngineering, built environment and information technology articles SDG-11SDG-11: Sustainable cities and communitiesEngineering, built environment and information technology articles SDG-12SDG-12: Responsible consumption and productionEngineering, built environment and information technology articles SDG-13SDG-13: Climate actionArticle