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- Title
Effect of Dimpled Rib with Arc Pattern on Hydrothermal Characteristics of Al 2 O 3 -H 2 O Nanofluid Flow in a Square Duct.
- Authors
Kumar, Anil; Maithani, Rajesh; Sharma, Sachin; Kumar, Sunil; Sharifpur, Mohsen; Alam, Tabish; Gupta, Naveen Kumar; Eldin, Sayed M.
- Abstract
The present work is concerned with the experimental analysis of the thermal and hydraulic performance of A l 2 O 3 − H 2 O nanofluid flow in dimpled rib with arc pattern in a square duct. The Alumina nanofluid consists of nanoparticles having a size of 30 nm. Reynolds number R e n u m studied in the square duct range from 5000 to 26,000. The nanoparticle volume fraction ( ϕ n p) ranges from 1.5% to 4.5%, the ratio of dimpled-arc-rib-height to print-diameter H A D / P d ranges from 0.533 to 1.133, the ratio of the dimpled-rib-pitch to rib height P A D / H A D range from 3.71 to 6.71 and dimpled arc angle ( α A D) range from 35° to 65°. The A l 2 O 3 − H 2 O -based nanofluid flow values of Nusselt number N u r s and friction factor f r s are higher in comparison to pure water. The dimpled ribs in the arc pattern significantly improved the thermal-hydraulic performance of the investigated test section. The nanoparticle concentration of 4.5%, the ratio of dimpled arc rib height to print diameter of 0.933, the relative dimpled arc rib height of 4.64 and the dimpled arc angle of 55° deliver the maximum magnitude of the heat transfer rate. The maximum value of the thermal-hydraulic performance parameters was found to be 1.23 for A l 2 O 3 − H 2 O -based nanofluid flow in a dimpled rib with arc pattern square duct for the range of parameters investigated. Correlations of N u r s , f r s and η r s have been developed for the selected range of operating and geometric parameters.
- Subjects
ELECTRIC arc; ALUMINUM oxide; NANOFLUIDS; NUSSELT number; REYNOLDS number; NANOPARTICLE size
- Publication
Sustainability (2071-1050), 2022, Vol 14, Issue 22, p14675
- ISSN
2071-1050
- Publication type
Article
- DOI
10.3390/su142214675