Abstract
This experimental study examines the properties of heat transfer, pressure drop and thermal performance factor (TPF) of a narrow undulant channel enhanced by skew sinusoidal wall-waves and 45° ribs. Detailed Nusselt number (Nu) distributions over the wavy ribbed channel wall are generated by the steady-state infrared thermography method and examined along with the accompanying pressure drop coefficient (f) in the test Reynolds number (Re) range of 800–9000. With references to the Nusselt numbers (Nu∞) and pressure drop coefficients (f∞) of smooth plain tube, the area-averaged heat transfer enhancement (HTE) ratios, pressure drop augmentations (f/f∞) and TPF for the tested undulant channel are compared with those obtained from other passive HTE devices. Empirical correlations evaluating the area-averaged Nusselt number (Nu¯) over the undulant ribbed channel wall and the pressure drop coefficients are generated to assist design activities using this newly devised HTE measure.
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.