Al-Obaidi, A.R. and Jaffal, H.M. 2021. Influence of Various Types of Twisted Tape inserts on Hydrody-namic, Pressure Drop and Thermal Heat Performance in Heat Ex-changers: A Review Study. Anbar Journal of Engineering Science. 12, 1 (May 2021), 29–46. DOI:https://doi.org/10.37649/aengs.2021.171196.