Nanofluid cooling of a hot rotating circular cylinder employing cross-flow channel cooling on the upper part and multi-jet impingement cooling on the lower part
Source abstract
Abstract
This study explores the convective cooling features of a hot rotating cylinder by using the combined utilization of cross-flow on the upper part and multi-jet impingement on the bottom part. The analysis is performed for a range of jet Reynolds number (Re) values (between 100 and 500), cross-flow Re values (between 100 and 1000), rotational Re values (between −1000 and 1000), cylinder size (between 0.25wj and 3wj in radius), and center placement in the y direction (between −1.5wj and 1.5wj). When the cylinder is not rotating, the average Nu increment becomes 102% at the highest jet Re, while it becomes 140.82% at the highest cross-flow Re. When rations become active, the impacts of cross-flow and jet impingement cooling become slight. As compared to a motionless cylinder, at the highest speed of the rotating cylinder, the average Nu rises by about 357% to 391%. For clockwise rotation of the cylinder, a lager cylinder results an increase in the average Nu by about 86.3%. At the lowest and highest cross-flow impinging jet Re value combinations, cooling performance improvement becomes a factor of 8.1 and 2, respectively. When the size of the cylinder changes, entropy generation becomes significant, while the vertical location of the cylinder has a slight impact on entropy generation.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Heat Transfer Mechanisms · Nanofluid Flow and Heat Transfer · Fluid Dynamics and Turbulent Flows
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Mechanical Engineering, College of Engineering, King Faisal University 1 , Al Ahsa 31982, Saudi Arabia
Department of Mechanical Engineering, Celal Bayar University 2 , 45140 Manisa, Türkiye
Department of Electrical Engineering, College of Engineering, Princess Nourah Bint Abdulrahman University 3 , Riyadh 11671, Saudi Arabia
Department of Industrial Engineering and Systems, College of Engineering, Princess Nourah Bint Abdulrahman University 4 , P.O. Box 84428, Riyadh 11671, Saudi Arabia
Department of Physics, College of Sciences, Princess Nourah Bint Abdulrahman University (PNU) 5 , P.O. Box 84428, Riyadh 11671, Saudi Arabia
Department of Electrical Engineering, College of Engineering, University of Ha’il 6 , Ha’il City, 81451, Saudi Arabia
Department of Software Engineering, College of Computer Engineering and Sciences, Prince Sattam Bin Abdulaziz University 7 , P.O. Box 151, Al-Kharj 11942, Saudi Arabia
Department of Mechanical Engineering, College of Engineering, University of Ha’il 8 , Ha’il City 81451, Saudi Arabia
9 Research Laboratory of Metrology and Energy Systems, LR18ES21, College of Engineering, University of Monastir, 5000, Monastir, Tunisia
Funding
Princess Nourah Bint Abdulrahman University
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Show source-provided references
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