Arrif, Toufik, Adel Benchabane, Abdelmadjid Chehhat, Abdelfetah Belaid, & Amar Rouag. " Numerical simulation of convective heat losses in a helical tube of a cylindrical solar receiver." Journal of Applied Engineering Science & Technology [Online], 4.2 (2018): 177. Web. 9 Dec. 2022