Microscale investigations of highfrequency wave propagation through highly porous media

Wave propagation in highly porous materials has a well established theoretical background -- Still there are parameters which require complex laboratory experimentation in order to find numerical values -- This paper presents an effective method to calculate the tortuosity of aluminum foam using numerical simulations -- The work flow begins with the acquisition of the foam geometry by means of a micro-CT scanner and further image segmentation and analysis -- The elastodynamic wave propagation equation is solved using a velocity-stress rotated staggered finite-difference technique -- The effective wave velocities are calculated and using the fluid and, aluminum effective properties, the tortuosity is determined

• Autores: Uribe, David; Saenger, Erik; Jänicke, Ralf; Steeb, Holger; Ruíz, Oscar
• Fecha de publicación: 2012
• Institución: Universidad EAFIT
• Repositorio: Repositorio EAFIT
• Idioma: eng
• OAI Identifier: oai:repository.eafit.edu.co:10784/9676
• Acceso en línea: http://hdl.handle.net/10784/9676
• Palabra clave: PROPAGACIÓN DE ONDAS; MATERIALES POROSOS; SIMULACIÓN POR COMPUTADORES; DISEÑO EXPERIMENTAL; MICROSCOPÍA DE RAYOS X; Wave propagation; Porous materials; Computer simulation; Experimental design; X-ray microscopy; Wave propagation; Porous materials; Computer simulation; Experimental design; X-ray microscopy; Espumas de aluminio; Microtomografía computarizada (Micro-CT) de rayos X; Elastodinámica
• License: Acceso cerrado