Abstract
The effects of eccentricity between the centers of helical screw tapes and tube on heat transfer, friction factor and performance evaluation criteria are numerically studied in this paper. A three-dimensional turbulence model is used to simulate the flow inside the tube with helical screw tape insert. All simulations are performed for four values of eccentricity (0, 0.5, 2, and 3.5) and Reynolds numbers in the range of 5000 to 12000. The obtained results indicated that the swirling effects created by helical screw tape insert are transferred from the tube core to near wall of the tube. This leads to the more mixing of fluid and centrifugal force near the wall, which has significant ability to improve the heat transfer rate at this region. There are 33%, 16.94%, 8.45%, and 7.3% increments in performance evaluation criteria for Re=5000, 7500, 10233, and 12000 when the eccentricity value is increased from 0 to 3.5.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
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.