Safaa Abdul Adheem Saleh; Zena Khalefa Kadhim; Kamil Abdulhusein Khalaf. An Experimental Study of Heating Heavy Fuel Oil by Hot Air Using Helical Fins in a Double-Pipe Heat Exchanger. J. Adv. Res. Fluid Mech. Therm. Sc. 2023, 112, 102-115.