%0 Journal Article %T Potential of gear-ring turbulator in three-dimensional heat exchanger tube from second law of thermodynamic viewpoint %A Moghaddaszadehbazzaz, Navid %A Rashidi, Saman %A Abolfazli Esfahani, Javad %J International Journal of Numerical Methods for Heat and Fluid Flow %@ 0961-5539 %D 2018