Jet impingement cooling of a constant heat flux horizontal surface in a confined porous medium: Mixed convection regime |
| |
| Authors: | A. Sivasamy V. Selladurai P. Rajesh Kanna |
| |
| Affiliation: | 1. Department of Mechanical Engineering, Sri Krishna College of Engineering and Technology, Coimbatore, Tamil Nadu 641008, India;2. Department of Mechanical Engineering, Coimbatore Institute of Technology, Coimbatore, Tamil Nadu 641014, India;3. Department of Mechanical Engineering, Kalasalingam University, Tamil Nadu, India;1. School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China;2. The Beijing Key Laboratory of Multiphase Flow and Heat Transfer, North China Electric Power University, Beijing 102206, China;1. School of Energy and Power Engineering, Northeast Dianli University, Jilin 132012, China;2. School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China;1. Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea;2. Thermal Hydraulics Safety Research Division, Korea Atomic Energy Research Institute (KAERI), 989-111 Daedeok-daero, Yuseong-gu, Daejeon 305-353, Republic of Korea |
| |
| Abstract: | In the present study, numerical investigation of jet impingement cooling of a constant heat flux horizontal surface immersed in a confined porous channel is performed under mixed convection conditions with the limitation of the Darcy model. The results are presented in the mixed convection regime with wide ranges of the governing parameters: Péclet number (1 ? Pe ? 1000), Rayleigh number (10 ? Ra ? 100), half jet width (0.1 ? D ? 1.0), and the distance between the jet and the heated portion (0.1 ? H ? 1.0). It is found that the average Nusselt number increases with increase in either Rayleigh number or jet width for high values of Péclet number. The average Nusselt number also increases with decrease in the distance between the jet and the heated portion. The correlation for Nuavg in the forced convection regime is suggested. It is shown that mixed convection mode can cause minimum average Nusselt number unfavorably due to counteraction of jet flow against buoyancy driven flow. Hence, careful consideration must be given while designing a system of jet impingement cooling through porous medium. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
