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THE MICROSTRUCTURAL EFFECTS OF RANDOMLY GENERATED POROUS MEDIA ON INTERFACIAL CONVECTIVE HEAT TRANSFER

DOI: 10.1615/ICHMT.2014.IntSympConvHeatMassTransf.350
pages 479-490

Eren Ucar
Mechanical Engineering Department, Izmir Institute of Technology, Urla 35430, Izmir, Turkey

Moghtada Mobedi
Faculty of Engineering, Shizuoka University, Hamamatsu, Japan

Azita Ahmadi
I2M − TREFLE Department, UMR CNRS 5295, Arts et Metiers ParisTech, Esplanade des Arts et Metiers, 33405 Talence Cedex, France

Abstract

Heat and momentum transfer in a random generated porous media is investigated. 6 different random porous media are generated using a Monte−Carlo (MC) procedure. The continuity, momentum and energy equations are solved for a row of cylinders with a square cross-section (i.e. rods) representing the entire domain of a random porous medium. The microstructure properties of the random porous media such as the mean nearest neighbor distance and the standard deviations of Voronoi areas, nearest neighbor distance and neighbor orientation for each generated random porous medium are obtained and compared with each other. The velocity and temperature fields in the porous media are shown via isotherms and streamlines. The rods in the domain are classified into three groups as blocker, active and passive rods based on our observations from the temperature field and the variations of the Nusselt number of each rod. The preliminary obtained results show that it may be possible to predict the interfacial heat transfer coefficient in a random porous medium based on some microstructure properties.

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