In this paper the properties of fluid flow and heat transfer in the shell and tube sides of macroscopically rough tube bundles with longitudinal flow have been analysed. The differences in momentum and heat transport of turbulent flow between macroscopically rough surface and smooth surface are discussed. Correlation equations of fluid friction factor and heat transfer coefficient in rough tubes and within rough tube bundles are derived

and the data of heat transfer and flow resistance of turbulent flow in spirally fluted

spirally finned and contracted-expanded tube bundles are correlated satisfactorily with these equations.