Awad, Afrah Turki, and Kutaeba J. M. Al-Khishali. “Numerical and Experimental Investigations of Heat Transfer Enhancement in a Duct Heater With Different Areas of Vortex Generators”. Al-Nahrain Journal for Engineering Sciences, vol. 20, no. 1, Jan. 2017, pp. 88-104, https://nahje.com/index.php/main/article/view/75.