Jassim, N.A., Abdul Hussin, K. and Abdul Abbass, N.Y. 2017. Numerical investigation of Heat Transfer Enhancement in Circular Tube using Twisted Tape Inserts and Nanotechnology. Wasit Journal of Engineering Sciences. 5, 2 (Apr. 2017), 42-54. DOI:https://doi.org/10.31185/ejuow.Vol5.Iss2.57.