Abstract
Heat transfer in tubes is influenced by surface roughness. The available literature gives no general equation which describes this influence numerically. In the present work a Nusselt equation is introduced which agrees well with data cited in the range of Prandtl numbers between 0.5 and 3. To obtain the equation, a modified Prandtl number is used in Gnielinski's equation. This Prandtl number represents an extension of the molecular Prandtl number which includes the ratio of the friction factors between smooth and rough surfaces. At higher Prandtl numbers (Pr > 3), significant differences between the equation and the available data occur.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Chemical Engineering & Processing: Process Intensification
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
