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Journal of Porous Media
Impact-faktor: 1.49 5-jähriger Impact-Faktor: 1.159 SJR: 0.504 SNIP: 0.671 CiteScore™: 1.58

ISSN Druckformat: 1091-028X
ISSN Online: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v17.i2.20
pages 103-116

PORE SCALE SIMULATION VS VOLUME AVERAGED TREATMENT OF TURBULENT REACTING AND NONREACTING FLOWS IN A POROUS MEDIUM

Nima F. Jouybari
Division of Fluid Mechanics, Lulea University of Technology, 971 87 Lulea, Sweden; Department of Mechanical Engineering, Tarbiat Modares University, P.O. Box 14115-143, Tehran, Iran
Mehdi Maerefat
Department of Mechanical Engineering, Tarbiat Modares University, P.O. Box 14115-143, Tehran, Iran
Majid E. Nimvari
Faculty of Engineering Technologies, Amol University of Special Modern Technologies, Amol, Iran

ABSTRAKT

Reacting and nonreacting flows in porous media have been studied in the present paper via two approaches, pore scale simulation and volume averaging model. The accurateness of the volume averaging model has been examined through pore scale simulation of turbulent flow in a simple but often used porous medium consisting of a staggered arrangement of square cylinders. The results show that, although the variations of temperature and turbulent characteristics are significant over a pore, the turbulent kinetic energy, flame speed, and temperature are fairly well predicted by the volume averaging model. However, the volume averaging model is unable to predict the flame curvature and the pore level local high temperature regions of the gas phase in the turbulent reacting flow in porous media which can be up to 18%. Other shortcomings of the volume averaging model are also disclosed through the sensitivity analysis of volume averaging solution to the volumetric heat transfer and extinction coefficients of porous media.


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