کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
155704 456909 2012 12 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
An irregular pore network model for convective drying and resulting damage of particle aggregates
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موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
An irregular pore network model for convective drying and resulting damage of particle aggregates
چکیده انگلیسی

An irregular pore network model for convective drying of random aggregates composed of mono-sized primary particles is introduced in this study. The network structure is generated by Voronoi tessellation of the aggregate and by designating the Voronoi edges as interconnected cylindrical pores; pore radii are computed from the distances to the neighboring particles. The obtained irregular structure captures many essential features of the pore space of real aggregates such as random node locations, distributed coordination number of nodes, randomly established pore connections as well as random spatial correlations of pore radius. In a next step, an isothermal pore network drying model, which uses invasion percolation concepts, is generalized to irregular structures, and drying simulations are carried out. Results are given as phase distributions, moisture profiles and drying rate curves. From this information, local capillary forces are approximated. These are seen as the reason for micro-cracks in the network of bonded particles. In a one-way coupling approach, the capillary forces are applied to the aggregate and the mechanical behavior is simulated by Discrete Element Method (DEM) to investigate inter-particle bond responses for different drying conditions.


► Irregular pore network models are generated.
► The isothermal pore network drying model is extended to new irregular structures.
► Time-dependent capillary forces are computed and their evolutions are shown.
► Discrete networks are coupled to describe damaging effect of capillary forces.
► Influence of liquid phase distribution on the degree of local damage is presented.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 75, 18 June 2012, Pages 267–278
نویسندگان
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