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Journal of Porous Media
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ISSN Druckformat: 1091-028X
ISSN Online: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v8.i4.40
pages 365-378

Transverse Dispersion in Open-Cellular Metallic Foams

Johan G. Fourie
British Columbia Institute of Technology, 3700 Willingdon Avenue, Burnaby BC, Canada V5G 3H2
Jean P. Du Plessis
Department of Applied Mathematics, University of Stellenbosch, Private Bag X1, Matieland 7602 South Africa

ABSTRAKT

Experimental transverse dispersion data was obtained from the observation of the macroscopic spreading of a neutrally buoyant tracer introduced into water traversing open-cellular aluminum foam samples. In the Peclet number range of 780−3900 used in this study, the contribution of molecular diffusion to the spreading of the tracer element was negligible. Digital images of the tracer distributions in the water entering and exiting the foam samples were recorded and analyzed. Tracer concentration distributions obtained from the digital images were indirectly related to transverse mass dispersion coefficients through the solution of the differential dispersion equation. Subsequently, transverse mass dispersion data was correlated in terms of a dimensionless dispersion parameter that takes into account the morphological properties of the foam.


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