Flow structure and heat transfer of jet impingement on a rib-roughened flat plate

Simple item page
dc.contributor.authorAlenezi, Abdulrahman H.
dc.contributor.authorAlmutairi, Abdulrahman
dc.contributor.authorAlhajeri, Hamad M.
dc.contributor.authorAddali, Abdulmajid
dc.contributor.authorGamil, Abdelaziz A. A.
dc.date.accessioned2018-06-25T13:54:07Z
dc.date.available2018-06-25T13:54:07Z
dc.date.issued2018-06-13
dc.description.abstractThe jet impingement technique is an effective method to achieve a high heat transfer rate and is widely used in industry. Enhancing the heat transfer rate even minimally will improve the performance of many engineering systems and applications. In this numerical study, the convective heat transfer process between orthogonal air jet impingement on a smooth, horizontal surface and a roughened uniformly heated flat plate is studied. The roughness element takes the form of a circular rib of square cross-section positioned at different radii around the stagnation point. At each location, the effect of the roughness element on heat transfer rate was simulated for six different heights and the optimum rib location and rib dimension determined. The average Nusselt number has been evaluated within and beyond the stagnation region to better quantify the heat transfer advantages of ribbed surfaces over smooth surfaces. The results showed both flow and heat transfer features vary significantly with rib dimension and location on the heated surface. This variation in the streamwise direction included both augmentation and decrease in heat transfer rate when compared to the baseline no-rib case. The enhancement in normalized averaged Nusselt number obtained by placing the rib at the most optimum radial location R/D = 2 was 15.6% compared to the baseline case. It was also found that the maximum average Nusselt number for each location was achieved when the rib height was close to the corresponding boundary layer thickness of the smooth surface at the same rib position.en_UK
dc.identifier.citationAlenezi AH, Almutairi A, Alhajeri HM, Addali A, Gamil AAA, Flow structure and heat transfer of jet impingement on a rib-roughened flat plate, Energies, Vol. 11, Isuee 6, 2018, Article number 1550en_UK
dc.identifier.issn1996-1073
dc.identifier.urihttp://dx.doi.org/10.3390/en11061550
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/13265
dc.language.isoenen_UK
dc.publisherMDPIen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectImpingement heat transfer enhancementen_UK
dc.subjectOthogonal jeten_UK
dc.subjectTurbulenceen_UK
dc.subjectFlate plateen_UK
dc.titleFlow structure and heat transfer of jet impingement on a rib-roughened flat plateen_UK
dc.typeArticleen_UK

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Flow_structure_and_heat_transfer-2018.pdf
Size:
1.2 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Staff publications (SATM)