We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
TRANSIENT CHARACTERISTICS OF COUPLED THERMAL RADIATION AND NATURAL-CONVECTION IN A 3-D CYLINDRICAL CAVITY CONTAINING A HEATED PLATE.
- Authors
WANG, Tianxiang; QIU, Yinan; LEI, Gang; ZHANG, Jinjin; HUANG, Yonghua; YANG, Guang
- Abstract
In this study, a numerical study of transient combined natural-convection and surface radiation in a cylindrical cavity with a heated plate placed inside is carried out using the open-source platform OpenFOAM. The effects of the Rayleigh number (105 ≤ Ra ≤ 107), inclination angle (0º ≤ φ ≤ 90º), and surface emissivity (0 ≤ ε ≤ 1) on the velocity components, temperature field, and Nusselt number are investigated in detail. Results show that the Rayleigh number has a greater effect on the radiative heat transfer than on natural-convection. Radiative heat transfer increases monotonously with the increase of surface emissivity, and its contribution could be over 50% of the total heat transfer rate. The inclination angle of the plate affects the flow structure, but the difference in total Nusselt number is less than 10% for various inclination angles. Results in this study provide insights into the transient characteristics of coupled thermal radiation and natural-convection in a 3-D cavity and will guide the optimal design of related devices.
- Subjects
RAYLEIGH number; HEAT radiation &; absorption; NUSSELT number; ENTHALPY; HEAT transfer
- Publication
Thermal Science, 2023, Vol 27, Issue 3B, p2377
- ISSN
0354-9836
- Publication type
Article
- DOI
10.2298/TSCI220523135W