Title of article :
Analysis and modeling of heaping behavior of granular mixtures within a computational mechanics framework
Author/Authors :
N. Christakis، نويسنده , , P Chapelle، نويسنده , , M.K. Patel، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2006
Abstract :
This paper presents a continuum model of the flow of granular material during filling of a silo, using a viscoplastic constitutive relation based on the Drucker-Prager plasticity yield function. The performed simulations demonstrate the ability of the model to realistically represent complex features of granular flows during filling processes, such as heap formation and non-zero inclination angle of the bulk material-air interface. In addition, micro-mechanical parametrizations which account for particle size segregation are incorporated into the model. It is found that numerical predictions of segregation phenomena during filling of a binary granular mixture agree well with experimental results. Further numerical tests indicate the capability of the model to cope successfully with complex operations involving granular mixtures.
Keywords :
Granular mixtures , continuum model , viscoplastic model , Segregation , heaping
Journal title :
Advanced Powder Technology
Journal title :
Advanced Powder Technology