Abstract

Many current and upcoming technologies are based on electronic gadgets controlled by an electronic clip. Because of their continuous operation, the efficiency of most electronic devices declines due to ineffective cooling methods. Researchers conducted several studies using Minichannels and Microchannels to dissipate heat from continuously operating electronic devices. The use of Minichannels and Microchannels to dissipate heat enhances the performance of electronic devices. The present study presents a numerical investigation using the Finite Element Method for circular mini-channels with hydraulic diameters of 167 µm to 2.5 mm and 200 mm long. Air is forced to pass through the channels, which are drilled into Aluminium piece of dimensions 200mm long, 120 wide, and 20 mm thick. The number of channels is 5, 9, and 11, with the same gap between each channel. The average air velocity through the channels varies from 0.5m/s to 1.0 m/s with a step of 0.5. The numerical results show that as the number of channels increases, the pressure drops across them, and the heat transfer rate increases for the entire range of airflow rates through the channels. Compared to the airflow rates through the channels, the heat transfer coefficient is significantly affected by a number of channels. However, the number of channels and the airflow rates through the channels more or less equally affect the friction factor.

Key words: Friction Factor; Heat Transfer coefficient; Nusselt Number; Pressure drop; Average velocity