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Combined mixed convection and radiation heat transfer in rectangular ducts rotating about a parallel axis
- Source :
-
International Journal of Heat & Mass Transfer . Oct2007, Vol. 50 Issue 21/22, p4229-4242. 14p. - Publication Year :
- 2007
-
Abstract
- Abstract: The study of combined heat transfer of convection and radiation in rectangular ducts rotating in a parallel mode was investigated numerically in detail. The coupled momentum and energy equations are solved by the DuFort–Frankel numerical scheme to examine the interactions of convection with radiation. The integro-differential radiative transfer equation is solved by the discrete ordinates method. Results are presented over a wide range of the governing parameters. The present results reveal that the rotational effect in a square duct is more significant than that in a rectangular one. The predictions also demonstrate that the radiation presents significant effects on the axial distributions of the total Nusselt number, Nu t, and tends to reduce the centrifugal-buoyancy effects. The effect of rotation on the Nu t is restricted in the entrance region, however, the radiation affects the heat transfer through out the channel. Additionally, the Nu t increases with the decrease in the conduction-to-radiation parameter N C. [Copyright &y& Elsevier]
- Subjects :
- *RADIATION
*HEAT transfer
*HEAT convection
*NUSSELT number
Subjects
Details
- Language :
- English
- ISSN :
- 00179310
- Volume :
- 50
- Issue :
- 21/22
- Database :
- Academic Search Index
- Journal :
- International Journal of Heat & Mass Transfer
- Publication Type :
- Academic Journal
- Accession number :
- 26038262
- Full Text :
- https://doi.org/10.1016/j.ijheatmasstransfer.2007.02.032