Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 54 1 2022 03 21 Numerical Simulation of Convective Heat Transfer of Nano-Encapsulated Phase Change Material Slurries in Micro-Channels with Sinusoidal Cavities and Rectangular Ribs Numerical Simulation of Convective Heat Transfer of Nano-Encapsulated Phase Change Material Slurries in Micro-Channels with Sinusoidal Cavities and Rectangular Ribs 169 188 4432 10.22060/mej.2021.19791.7113 FA Hadi Nemati-Moghadam Department of Mechanical Engineering,, Amirkabir University of Technology, Tehran, Iran. Ali Ahmadpour Department of Mechanical Engineering,, Amirkabir University of Technology, Tehran, Iran. Mohammad Reza Hajmohammadi Department of Mechanical Engineering,, Amirkabir University of Technology, Tehran, Iran. Journal Article 2021 03 25 In the present study, the Thermo-hydraulic performance evaluation of nano-encapsulated phase change material slurries was undertaken in a micro-channel heat sink. The present research was motivated by the urgent need for the performance enhancement of micro-sized heat sinks for the electronic cooling application. A micro-channel with sinusoidal cavities and rectangular ribs was chosen as the flow domain in the present study and the steady laminar flow of nano-encapsulated phase change material slurries was investigated inside the micro-channel. A single-phase model was adopted for the simulation of slurry flow and heat transfer using the well-known finite volume method. Ansys Fluent software was used to solve the governing equations and simulate the flow. In the current study, Nusselt number, friction factor, and performance factor were used to measure the thermal-hydrodynamic performance of the studied slurries. Numerical simulations were performed for Reynolds numbers ranging from 200 to 1000 and nanoparticle concentrations ranging from 0 to 30%. It was shown that adding nano-encapsulated phase change material to a base fluid like water enhanced the thermal performance of the resulting slurry. A 6% to 48% increase in the Nusselt number was reported along the microchannel. In the present study, the Thermo-hydraulic performance evaluation of nano-encapsulated phase change material slurries was undertaken in a micro-channel heat sink. The present research was motivated by the urgent need for the performance enhancement of micro-sized heat sinks for the electronic cooling application. A micro-channel with sinusoidal cavities and rectangular ribs was chosen as the flow domain in the present study and the steady laminar flow of nano-encapsulated phase change material slurries was investigated inside the micro-channel. A single-phase model was adopted for the simulation of slurry flow and heat transfer using the well-known finite volume method. Ansys Fluent software was used to solve the governing equations and simulate the flow. In the current study, Nusselt number, friction factor, and performance factor were used to measure the thermal-hydrodynamic performance of the studied slurries. Numerical simulations were performed for Reynolds numbers ranging from 200 to 1000 and nanoparticle concentrations ranging from 0 to 30%. It was shown that adding nano-encapsulated phase change material to a base fluid like water enhanced the thermal performance of the resulting slurry. A 6% to 48% increase in the Nusselt number was reported along the microchannel. https://mej.aut.ac.ir/article_4432_da94cbeff56cfda50785df477941308b.pdf