Radiation effects on mixed convection heat transfer in a square duct rotating about a parallel axis
Conference
·
OSTI ID:20002474
A numerical study has been carried out to examine the combined convection and radiation heat transfer in a square duct rotating around a parallel axis. The coupled momentum and energy equations are solved by the DuFort-Frankel numerical scheme. The integro-differential radiative transport equation is solved by the discrete ordinates method. Results are presented over a wide range of the governing parameters. The effects of rotation-induced buoyancy and thermal radiation on the developments of velocity, temperature, friction factor and Nusselt number are examined in detail. The axial variations of the f Re and Nu{sub t} are characterized by a decay near the entrance due to the entrance effect, but the decay is attenuated by the onset of the secondary flow. The predictions also demonstrate that the radiation presents significant effects on the axial distributions of the total Nusselt number Nu{sub t} and tends to reduce the centrifugal buoyancy effects. Additionally, the Nu{sub t} increases with the decrease in the conduction-to-radiation parameter N{sub c}.
- Research Organization:
- Huafan Univ., Taipei (TW)
- OSTI ID:
- 20002474
- Report Number(s):
- CONF-990805--
- Country of Publication:
- United States
- Language:
- English
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