Hossain, Mohammad Taukir, Nesar Ali, and Muhammad Sadekul Karim. 2018. “Enhancement of Heat Transfer in a Rouletted Copper Tube Employing Delta Winglet Twirled Type Insert”. European Journal of Engineering and Technology Research 3 (5):47-51. https://doi.org/10.24018/ejeng.2018.3.5.743.