کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
237267 465699 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Energy dissipation in agglomerates during normal impact
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Energy dissipation in agglomerates during normal impact
چکیده انگلیسی

This work presents the results of the computational analysis of the influence of interparticle cohesion on the energy propagated and dissipated in agglomerates during impact against a rigid target. Agglomerate impact was simulated using Discrete Element Method (DEM). The cohesion between particles was simulated using the Johnson, Kendall and Roberts model. Four different regimes of breakage have been identified and the energy dissipated by the agglomerate upon impact has been determined for each regime of breakage. A comparison between the energy dissipated by the breakage of individual interparticle contacts and the net loss of kinetic energy has shown that the rupture of interparticle bonds utilises less than 10% of the total kinetic energy dissipated during agglomerate impact for all cases analysed here. In contrast, most of the incident kinetic energy is dissipated by contact damping and tangential deformation between the individual particles forming the agglomerates.

The investigation of the energy dissipation upon impact of agglomerates has been presented. The most important feature is that the energy dissipated in contact breakage is less than 10% of the total energy dissipated in the agglomerates during impact, independent of the value of the cohesion.Figure optionsDownload as PowerPoint slideResearch highlights
► We present the analysis of the energy dissipated in agglomerates during impact.
► The energy loss is proportional to the kinetic energy.
► For intermediate values of impact velocity the behaviour is non-linear.
► The energy consumed is proportional to the number of broken contacts.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Powder Technology - Volume 223, June 2012, Pages 12–18
نویسندگان
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