Abdullah, M. S., and A. M. Hussein. “Experimental and Numerical Investigations on the Heat Transfer of a Helical Coil Heat Exchanger Utilized α-Al2 O3 Nanofluid”. Diyala Journal of Engineering Sciences, vol. 16, no. 3, Sept. 2023, pp. 64-81, doi:10.24237/djes.2023.16306.