Mixed convective heat transfer from vertical fin array in the presence of vortex generator. (March 2015)

• Record Type: Journal Article
• Authors: Das, Biplab; Giri, Asis
• Is Part Of: International journal of heat and mass transfer. Volume 82(2015:Mar.)
• Page Start: 26
• Page End: 41
• Publication Date: 2015-03
• Subjects: Mixed convection -- Vortex generator -- Non-isothermal fin -- Nusselt number; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Electronic journals; 621.4022
• DOI: 10.1016/j.ijheatmasstransfer.2014.11.030
• Languages: English
• ISSNs: 0017-9310

Abstract

Abstract: Vortex induced non-Boussinesq laminar mixed convective heat transfer in a shrouded vertical non-isothermal fin array has been investigated numerically taking into account the variable transport properties. Computations are performed for the parametric range: Grashof number = 4.3–8.4 × 10 5, Reynolds number = 1280–2667, dimensionless fin spacing = 0.2–0.5 and dimensionless clearance = 0.0–0.25. Computations demonstrate inclusion of vortex generator results in a rise of pressure drop across the duct length to a value as high as 150% which is compensated by the substantial enhancement in heat transfer, as high as 200% locally and 20% globally compared to without vortex generator. Finally, overall Nusselt number is well correlated with the governing parameters of the problem.