Study of ternary glass spherical particle beds : porosity, tortuosity, and perm...

• Author(s): Dias, Ricardo P. ; Mota, Manuel ; Teixeira, José A. ; Yelshin, Alexander
• Date: 2005
• Persistent ID: http://hdl.handle.net/10198/7037
• Origin: Biblioteca Digital do IPB
• Subject(s): Ternary mixed bed; Porosity; Tortuosity; Permeability
• Document Type: Article
• Language: English

Description

Ternary mixtures of glass beads were constructed as a model of granular packing. Porosity and permeability were experimentally determined in a wide range of mixture composition. Based on experimental data, tortuosity was calculated using the Kozeny-Carman equation. Applying the conventional relation that expresses tortuosity as the inverse of the power order of porosity, it was found that the parameter n varies with the fraction content. The observed phenomenon was explained by wall effects between particles of different sizes.