Effect of different flow regimes on free convection heat transfer from isothermal convex bodies over all range of Rayleigh and Prandtl numbers

Arabi, Pouria; Jafarpur, Khosrow

doi:10.1007/s00231-015-1683-3

Cited by 8 publications

(1 citation statement)

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“…This parameter is indicative of the strength of conduction over convection heat transfer. A further study was undertaken by Arabi and Jafarpur to calculate free convection heat transfer from isothermal convex bodies having arbitrary shapes over the full range of Rayleigh and Prandtl numbers using the dynamic behavior of gravity function model.…”

Section: Introductionmentioning

confidence: 99%

Correlations for Natural Convective Heat Transfer from Isothermal Surface of Octagonal and Hexagonal Shapes of Different Aspect Ratios

Kalendar

Karar

Kalendar

et al. 2016

Heat Trans. Asian Res.

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The effect of surface shape on laminar natural convective heat transfer from vertical isothermal hexagonal and octagonal flat plates embedded in a plane adiabatic surface, the adiabatic surface being in the same plane as the surface of the heated plate, has been numerically investigated. Results for the hexagonal and octagonal surface shapes with different aspect ratios have been obtained. It has been assumed that the fluid properties are constant except for the density change with temperature which gives rise to the buoyancy forces, this having been treated using the Boussinesq approach. The solution has been obtained by numerically solving the full threedimensional form of governing equations, these equations being written in dimensionless form. The solution was obtained using the commercial finite volume method based cfd code, FLUENT C⃝ 14.5. The solution has the surface shape, the Rayleigh number, the dimensionless plate width and the Prandtl number as parameters. Results have only been obtained for a Prandtl number of 0.7 for Rayleigh numbers between 10 3 and 10 8 for various surface shapes with width-to-height ratios between 0 and 0.6. The effect of these parameters on the mean Nusselt number has been studied and empirical correlation equations for the mean heat transfer rate have been derived. C⃝ 2016 Wiley Periodicals, Inc. Heat Trans Asian Res, 00(0): 1-22, 2016; Published online in Wiley Online Library (wileyonlinelibrary.com/journal/htj).

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Section: Introductionmentioning

confidence: 99%