The effects of radiation on natural convection in a rectangular enclosure divided by two partitions

Journal Article · Fri Feb 25 04:00:00 EST 2000 · Numerical Heat Transfer. Part A, Applications

OSTI ID:20020796

Han, C Y; Baek, S W

The problem of natural convection in an enclosure is one of the interesting topics concerning thermal and mass transport processes involved in various types of engineering systems such as thermal insulation in buildings, unexpected hostile fire hazard, chip cooling in electronic or computer equipment, and thermal behavior in nuclear reactors. Here, the phenomena of radiation-affected steady-laminar natural convection in a rectangular enclosure with two incomplete partitions are numerically examined under a large temperature difference. Pure convection, convection with surface radiation, and convection with surface/gas radiation are considered and compared. To examine the effects of two incomplete partitions on thermofluid dynamics behavior, they are assumed to be very thin and adiabatic. The finite-volume method (FVM) is used for solving the radiative transport equation, assuming that partitions are radiatively opaque. After validating the numerical procedures, the detailed radiation effects were sought. Based on the results of this study, it was found that the radiation played a significant role in developing the fluid dynamic and thermal distributions compared with cases without radiation. Once radiation was involved, the surface radiation was dominant over the gas radiation. The baffle configuration was also found to affect the results of radiation.

• Research Organization: Korea Advanced Inst. of Science and Technology, Taejon (KR)
• OSTI ID: 20020796
• Journal Information: Numerical Heat Transfer. Part A, Applications, Journal Name: Numerical Heat Transfer. Part A, Applications Journal Issue: 3 Vol. 37; ISSN 1040-7782; ISSN NHAAES
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
BAFFLES
CAVITIES
LAMINAR FLOW
NATURAL CONVECTION
NUMERICAL ANALYSIS
RADIANT HEAT TRANSFER
USES