Volume 1, Issue 2, August 2015, Page: 30-43
Experimental and Numerical Investigations of Transient Natural Convection in Differentially Heated Air-Filled Tall Cavity
Lioua Kolsi, College of Engineering, Mechanical Engineering Department, Haïl University, Haïl City, Saudi Arabia; Research Unit of Metrology and Energy Systems, National Engineering School, Energy Engineering Department, University of Monastir, Monastir city, Tunisia
Mohamed Bechir Ben Hamida, High School of Sciences and Technology of Hammam Sousse (ESSTHS), Department of Physics, University of Sousse, Sousse, Tunisia; Research Unit of Ionized Backgrounds and Reagents Studies (UEMIR), Preparatory Institute for Engineering Studies of Monastir (IPEIM), University of Monastir, Monastir city, Tunisia
Walid Hassen, Research Unit of Metrology and Energy Systems, National Engineering School, Energy Engineering Department, University of Monastir, Monastir city, Tunisia
Ahmed Kadhim Hussein, College of Engineering, Mechanical Engineering Department, Babylon University, Babylon City, Hilla, Iraq
Mohamed Naceur Borjini, Research Unit of Metrology and Energy Systems, National Engineering School, Energy Engineering Department, University of Monastir, Monastir city, Tunisia
S. Sivasankaran, Institute of Mathematical Sciences, University of Malaya, Kuala Lumpur, Malaysia
Suvash C. Saha, School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane QLD, Australia
Mohamed M. Awad, Mechanical Power Engineering Department, Faculty of Engineering, Mansoura University, Mansoura city, Egypt
Farshid Fathinia, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, UTM Johor Bahru, Malaysia
Habib Ben Aissia, Research Unit of Metrology and Energy Systems, National Engineering School, Energy Engineering Department, University of Monastir, Monastir city, Tunisia
Received: Jun. 19, 2015;       Accepted: Jun. 30, 2015;       Published: Jul. 2, 2015
DOI: 10.11648/j.ajme.20150102.12      View  2846      Downloads  115
Abstract
The two-dimensional laminar natural convective transient flow characteristics in a differentially heated air-filled tall cavity with gradual heating are investigated both experimentally and numerically for various parameters such as Rayleigh number and temperature difference. Experimental computations are performed for temperature difference varying from (∆T = 5°C) to (∆T = 23°C) while the Rayleigh number varies from (Ra = 2929) to (Ra =11772) to cover a wide range of the flow field inside the cavity. The results show that as the Rayleigh number increases the flow becomes unstable. Also, the flow characteristics are observed to be multi-cellular and time variant especially at high Rayleigh numbers. Moreover, numerical computations are performed to compare with the experimental results.
Keywords
Natural Convection, Tall Cavity, Experimental Investigation, Transient, Gradual Heating
To cite this article
Lioua Kolsi, Mohamed Bechir Ben Hamida, Walid Hassen, Ahmed Kadhim Hussein, Mohamed Naceur Borjini, S. Sivasankaran, Suvash C. Saha, Mohamed M. Awad, Farshid Fathinia, Habib Ben Aissia, Experimental and Numerical Investigations of Transient Natural Convection in Differentially Heated Air-Filled Tall Cavity, American Journal of Modern Energy. Vol. 1, No. 2, 2015, pp. 30-43. doi: 10.11648/j.ajme.20150102.12
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