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International Society for Industrial Process Tomography

6th World Congress on Industrial Process Tomography

Measurement of volume changes during gravitational flow in the silo based on the X-ray radiographs using PIV technique


Krzysztof Grudzień1, Maciej Niedostatkiewicz2, Dominik Sankowski3, Eric Maire3


1Technical University of Lodz, Computer Engineering Department, Lodz, Poland, kgrudzi@kis.p.lodz.pl 2Gdansk University of Technology, Department of Fundamentals of Building and Material Engineering, Gdansk, Poland

3 Université de Lyon, INSA-Lyon, MATEIS CNRS, Villeurbanne, France


ABSTRACT


The paper presents results of the solid concentration changes observation in the core of flow during emptying the silo with funnel flow. Application of PIV (Particle Image Velocimetry) measurement technique for analysis coordinated with the X-ray radiographs allows to receive additional information about the direction of the oscillation at the core of flow during silo emptying process. The experiments in model silo were carried out with different initial densities of sand and silo wall roughness. The obtained image of volumetric strain on the basis of X-ray radiographs from the continuous exposure were compared with gathered from the digital images presented the deformation of the bulk solid at the next to the transparent wall parts of the silo.


Keywords granular material, X-ray radiation, Particle Image Velocimetry (PIV), silo flow, continuous

solid concentration


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