Al-Obaidi, Ahmed Ramadhan, and Hayder Mohammad Jaffal. 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): 29-46. https://doi.org/10.37649/aengs.2021.171196.