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Journal of Porous Media
Facteur d'impact: 1.49 Facteur d'impact sur 5 ans: 1.159 SJR: 0.43 SNIP: 0.671 CiteScore™: 1.58

ISSN Imprimer: 1091-028X
ISSN En ligne: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v15.i6.40
pages 549-563


Jose C. F. Pereira
Mechanical Engineering Department Instituto Superior Tecnico Av. Rovisco Pais, 1049-001 Lisboa Portugal
Isabel Malico
Department of Physics, University of Évora, R, Romão Ramalho, 59, 7000-671, Évora, Portugal ; IDMEC/IST, Department of Mechanical Engineering, Technical University of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
T. C. Hayashi
Department of Chemical Engineering, Universidade Federal da Bahia,R. Aristides Novis, 2, Federação, 40210-630, Salvador, BA, Brazil
Jorge M. F. Raposo
IDMEC/IST, Department of Mechanical Engineering, Technical University of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon, Portugal


This article reports experiments and calculations for the flow at the inlet and exit of a ceramic foam located in a straight pipe and in a pipe with a 1:4 sudden expansion. For the latter, the foam, with thickness to diameter ratio between 0.15 and 0.60, was located at different distances from the sudden expansion wall. Three different pore sizes (10, 20, and 60 ppi) were investigated for pore Reynolds numbers in the range 20 ≤ Rep ≤ 400. LDA measurements include velocity profiles at the foam exit as a function of the Reynolds number, foam thickness, and inlet conditions and confirm that the outlet multijet flow structure induced by the nonregular configuration of the porous matrix results in a strongly three-dimensional velocity field that dissipates as the fluid flows downstream. Numerical calculations were performed to assess the suitability of available models for turbulent flow within porous media. Two different turbulence models and a laminar model for flow within the porous medium were considered. The numerical and physical models used could not reproduce completely the foam influence on the separated turbulent flow region formed between the sudden pipe expansion and the foam inlet.