PORE NETWORK DRYING MODEL FOR PARTICLE AGGREGATES: ASSESSMENT BY X-RAY MICROTOMOGRAPHY

摘要：

Drying experiments of random packings made of glass beads have been carried out under quasi-isothermal conditions in an X-ray microtomography device.Evolution of the liquid distribution during drying has been tracked by visualizing all three phases (solid, liquid and gas) at the pore scale.During the data acquisition steps, the drying process was interrupted.From the experimental 3D images, particle center coordinates and radii are extracted by image analysis using binarization and segmentation techniques.These data are subsequently used to generate a network of cylindrical pores for drying simulations.Voronoi tessellation and a node merging algorithm are employed to this purpose.By identifying individual pores of the network with sets of voxels in the experimental image, the present work will help assessing the ability of pore network modeling to describe drying of particle aggregates.

关键词： irregular pore network model X-ray microtomography convective drying particle aggregates

作者: Yujing Wang Abdolreza Kharaghani Thomas Metzger Evangelos Tsotsas

作者单位: Thermal Process Engineering,Otto von Guericke University,P.O.Box 4102,39106 Magdeburg,Germany

会议类型: 国际会议

会议名称: The 7th Asia-Pacific Drying Conference(第七届亚太地区干燥会议 ADC2011)

会议地点: 天津

会议语种:英文

页码: 1-8

在线出版日期: 2011-09-18（万方平台首次上网日期，不代表论文的发表时间）