@article {168682,
	title = {Numerical investigation of heat transfer and friction characteristics for turbulent flow in various corrugated tubes},
	journal = { Journal of Power and Energy,  Engineers, SAGE Publication},
	volume = {20},
	year = {2019},
	pages = {xx-xx},
	author = {Amr Kaood and Taher AbouDief and Mohamed ElTahan and Yehia, Mohamed and Essam E. Khalil}
}
