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Journal of Enhanced Heat Transfer
Factor de Impacto: 1.406 Factor de Impacto de 5 años: 1.075 SJR: 0.287 SNIP: 0.653 CiteScore™: 1.2

ISSN Imprimir: 1065-5131
ISSN En Línea: 1563-5074

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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v24.i1-6.130
pages 239-269

MORPHOLOGY: TWO-TEMPERATURE STATEMENTS FOR CONVECTIVE TRANSPORT IN POROUS MEDIA

L. J. Gratton
Mechanical, Aerospace and Nuclear Engineering Department, University of California, Los Angeles, CA 90024-1597
V. S. Travkin
Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, California 90024-1597
Ivan Catton
Morin, Martinelli, Gier Memorial Heat Transfer Laboratory, Department of Mechanical and Aerospace Engineering, School of Engineering and Applied Science, University of California, Los Angeles, USA

SINOPSIS

Transport models for forced, single phase fluid convection are reviewed for non-uniformly and randomly structured highly porous media. Special attention is given to the evaluation of a two-temperature energy model. For means of comparison, a one-temperature, effective thermal diffusivity model is developed, emphasizing local solid phase morphology using analytic techniques. Random characteristics of the porous medium are simulated by the use of regular and unspecified, pre-assigned solid phase morphologies. An overall coefficient of drag resistance is determined by implementing a multiple-regime superposition approach. Coefficient models are evaluated using the governing averaged transport equations set and solved numerically. Variability of the morphology descriptors is shown to potentially govern large fluctuations in transport parameter values and distributions. Results generally compare favorably among work by Koch and Brady; Fand and Thinakaran; Adnani, Raffray, Abdou, and Catton; and Watanabe.


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