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Browsing by Subject "x-ray radiography"

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    Item type:Article, Access status: Open Access ,
    Application of particle image velocimetry method for monitoring the volume changes during silo flow on the basis of X-radiographs
    (Wydawnictwa AGH, 2010) Grudzień, Krzysztof; Niedostatkiewicz, Maciej; Babout, Laurent; Adrien, Jerome
    Particle Image Velocimetry (PIV) technique, as an optical method of flow visualisation, is based on the numerical analysis of successive pairs of digital photographs (CCD camera). It is typically used to obtain the time dependent field of velocity distributions of flowing material. In case of silo flow PIV methods allows to analyse of the volumetric strain in sand during silo discharging process. Monitoring of granular materials volumetric strain in silos is crucial for construction site safety. Authors are presenting application of PIV method for analysis of a bulk solid deformation during silo emptying to images obtained using X-ray, continuous exposure based radiographs. Analysis of radiograph images enables to gather the additional information, comparing to classical input data for PIV-digital photographs, about the volume changes, especially in the core of flow and above the outlet. Results are presented as volumetric strain changes for selected time points of the silo emptying process.