Safaa Abdul Adheem Saleh, Zena Khalefa Kadhim and Kamil Abdulhusein Khalaf 2023. An Experimental Study of Heating Heavy Fuel Oil by Hot Air using Helical Fins in a Double-Pipe Heat Exchanger. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences. 112, 2 (Dec. 2023), 102–115. DOI:https://doi.org/10.37934/arfmts.112.2.102115.