Natural Convective Heat Transfer from Horizontal and Near Horizontal Surfaces by Patrick H. Oosthuizen & Abdulrahim Y. Kalendar

Natural Convective Heat Transfer from Horizontal and Near Horizontal Surfaces by Patrick H. Oosthuizen & Abdulrahim Y. Kalendar

Author:Patrick H. Oosthuizen & Abdulrahim Y. Kalendar
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham


(4.1)

the dimensionless distance to which the surface protrudes or is recessed, i.e.:

(4.2)

the Prandtl number, Pr.

Results have only been obtained for a Prandtl number of 0.74, i.e. effectively the value for air, and have been obtained for Rayleigh numbers of between approximately 105 and 1016.

The total heat transfer rate from the heated circular surfaces, , has been expressed in terms of a mean Nusselt number based on the diameter, d, of the circular surface and on the difference between the temperature of the heated surface and the temperature of the undisturbed fluid well away from the system, i.e.:



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