Investigation of the effect of rectangular winglet angles on turbulent flow and heat transfer of water/Cu nanofluid in a three-dimensional channel

Tavakoli, Mohammad Reza1; Akbari, Omid Ali1; Mohammadian, Anoushiravan1; Pourfattah, Farzad2

2024-08-30

10.1016/j.heliyon.2024.e36482

HELIYON   影响因子和分区

2405-8440

This numerical simulation studies a homogenous and single-phase nanofluid's turbulent flow and heat transfer behavior in a three-dimensional rectangular microchannel. This study's main purpose is to investigate the use of rectangular winglet angles on flow path and its effect on turbulent flow regime and heat transfer parameters. In the current study, the Reynolds number, winglet attack angle (theta), and twisted angle range (alpha) (or Pitch angle) from 3000 to 12000, 30 degrees <= theta <= 60 degrees, and 15 degrees <=alpha <= 45 degrees, respectively. Also, Cu nanoparticles with volume fractions of 0-4% are used in water as the base fluid. Results of this study show that heat transfer and flow physics of cooling fluid are affected by the variations of attack angle and winglet twist, and the creation of secondary flows leads to the mixture and deviation of flow. A decrease in the attack angle of the winglet causes the creation of strong vortexes and an increase in Nusselt number and heat transfer. In all investigated situations, with the angle of attack constant, increasing the twist angle can improve the Nusselt number between 11 and 18 percent. Also, increasing the angle of attack of the winglet from 30 to 60 degrees can reduce the Nusselt number by 4-8 percent. The results indicate that changing the winglet angle increases the friction coefficient, and at higher Reynolds numbers, this parameter decreases. Also, by increasing Reynolds number, the ratio of friction coefficient to Nusselt number reduces, leading to the decrease of performance evaluation criterion (PEC).

Heat transfer Rectangular winglet Nusselt number Rectangular channel Performance evaluation criterion (PEC) Friction coefficient

SCI

英语

其他

Science & Technology - Other Topics

Multidisciplinary Sciences

WOS:001299113900001

CELL PRESS

Web of Science

1.Isfahan Univ Technol, Dept Mech Engn, Esfahan 8415683111, Iran
2.Southern Univ Sci & Technol, Mech & Aerosp Engn Dept, Shenzhen, Guangdong, Peoples R China

Tavakoli, Mohammad Reza,Akbari, Omid Ali,Mohammadian, Anoushiravan,et al. Investigation of the effect of rectangular winglet angles on turbulent flow and heat transfer of water/Cu nanofluid in a three-dimensional channel[J]. HELIYON,2024,10(16).

Tavakoli, Mohammad Reza,Akbari, Omid Ali,Mohammadian, Anoushiravan,&Pourfattah, Farzad.(2024).Investigation of the effect of rectangular winglet angles on turbulent flow and heat transfer of water/Cu nanofluid in a three-dimensional channel.HELIYON,10(16).

Tavakoli, Mohammad Reza,et al."Investigation of the effect of rectangular winglet angles on turbulent flow and heat transfer of water/Cu nanofluid in a three-dimensional channel".HELIYON 10.16(2024).