2016-11-182012-090020-7225http://hdl.handle.net/10784/9679This paper is concerned with numerical wave propagation effects in highly porous media using digitized images of aluminum foam -- Starting point is a virtual material laboratory approach -- The Aluminum foam microstructure is imaged by 3D X-ray tomography -- Effective velocities for the fluid-saturated media are derived by dynamic wave propagation simulations -- We apply a displacement-stress rotated staggered fnite-difference grid technique to solve the elastodynamic wave equation -- The used setup is similar to laboratory ultrasound measurements and the computed results are in agreement with our experimental data -- Theoretical investigations allow to quantify the influence of the interaction of foam and fluid during wave propagation – Together with simulations using an artificial dense foam we are able to determine the tortuosity of aluminum foamapplication/pdfenginfo:eu-repo/semantics/openAccessinfo:eu-repo/semantics/articlePROPAGACIÓN DE ONDASTOMOGRAFÍA COMPUTARIZADA POR RAYOS XPOROSIDADPERMEABILIDADMATERIALES POROSOSLABORATORIOS DE INGENIERÍAULTRASONIDOPROCESAMIENTO DIGITAL DE IMÁGENESWave propagationTomography, X-ray computedPorosityPermeabilityPorous materialsEngineering laboratoriesUltrasonicsImage processing - Digital techniquesWave propagationTomographyX-ray computedPorosityPermeabilityPorous materialsEngineering laboratoriesUltrasonicsImage processing - Digital techniquesModelado geométricoEspumas de aluminioModelos computacionalesAcceso abierto2016-11-18Saenger, E.H.Uribe, D.Jänicke, R.Ruíz, O.Steeb, H.10.1016/j.ijengsci.2012.03.030