TY - JOUR
T1 - Hydro-thermal performance of an I-shaped pin fin microchannel heat sink with variable pin fin height, thickness and orientation
AU - Sallar, Hussain
AU - Irfan, Muhammad
AU - Khan, Muhammad Mahabat
AU - Shahzad, Muhammad Wakil
PY - 2024/11/6
Y1 - 2024/11/6
N2 - Novel I-shaped pin fins have been investigated numerically to enhance the hydro-thermal performance of a microchannel heat sink. The proposed I-shaped design reduces the obstruction to the flowing fluid and enhances the heat transfer surface area. The height and thickness of pin fins are varied in the range of 0.75–2 mm and 0.1–0.4 mm, respectively. Water acts as coolant while Copper is the material of the heat sink. Base temperature, Nusselt number, pressure drop and thermal performance factor are the key performance parameters. Results indicate that the base temperature decreases and pressure drop increases as the fin height and thickness are increased. The optimum fin geometry is identified as the one with a height of 1.5 mm and thickness of 0.4 mm, yielding a thermal performance factor of 1.16. To explore the effects of the angular orientation of fins, four distinct designs of heat sinks are created. The fins in each design are varied in the range 15°-90°. The highest thermal performance factor of 1.29 is achieved at 15°orientation, depicting a performance enhancement of 29 % as compared to the square fin base case. Angular-oriented fins create converging-diverging channels. These give rise to distinct velocity profiles which dictate the hydro-thermal performance.
AB - Novel I-shaped pin fins have been investigated numerically to enhance the hydro-thermal performance of a microchannel heat sink. The proposed I-shaped design reduces the obstruction to the flowing fluid and enhances the heat transfer surface area. The height and thickness of pin fins are varied in the range of 0.75–2 mm and 0.1–0.4 mm, respectively. Water acts as coolant while Copper is the material of the heat sink. Base temperature, Nusselt number, pressure drop and thermal performance factor are the key performance parameters. Results indicate that the base temperature decreases and pressure drop increases as the fin height and thickness are increased. The optimum fin geometry is identified as the one with a height of 1.5 mm and thickness of 0.4 mm, yielding a thermal performance factor of 1.16. To explore the effects of the angular orientation of fins, four distinct designs of heat sinks are created. The fins in each design are varied in the range 15°-90°. The highest thermal performance factor of 1.29 is achieved at 15°orientation, depicting a performance enhancement of 29 % as compared to the square fin base case. Angular-oriented fins create converging-diverging channels. These give rise to distinct velocity profiles which dictate the hydro-thermal performance.
KW - Microchannel heat sink
KW - Fins
KW - Thermal performance enhancement
KW - Nusselt number
KW - Pressure drop
UR - http://www.scopus.com/inward/record.url?scp=85208199236&partnerID=8YFLogxK
U2 - 10.1016/j.icheatmasstransfer.2024.108256
DO - 10.1016/j.icheatmasstransfer.2024.108256
M3 - Article
SN - 0735-1933
VL - 160
JO - International Communications in Heat and Mass Transfer
JF - International Communications in Heat and Mass Transfer
M1 - 108256
ER -