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Drying Technology
An International Journal
Volume 28, 2010 - Issue 7: Dewatering
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Original Articles

Model for Sludge Cake Drying Accounting for Developing Cracks

Jyh-Ping Hsu Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
,
Tao Tao Laboratory of Phase Change & Interfacial Transport Phenomena, Department of Thermal Engineering, Tsinghua University, Beijing, China
,
Ay Su Fuel Cell Center, Department of Mechanical Engineering, Yuan Ze University, Taoyuan, Taiwan
,
Arun S. Mujumdar Department of Mechanical Engineering, National University of Singapore, Singapore
&
Duu-Jong Lee Department of Chemical Engineering, National Taiwan University, Taipei, TaiwanCorrespondence[email protected]
Pages 922-926 | Published online: 07 Jul 2010
 
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Abstract

This study analyzed convective drying of wastewater sludge cakes with three-dimensional cake structures probed using an X-ray microcomputerized tomography scanner (micro-CT). Crack development and surface skin layers were utilized in model development. The drying cake had an extremely heterogeneous structure, with detail presented by constructed three-dimensional, tetrahedral volumetric grids. Drying modeling was conducted numerically by solving the conservation equations with assigned boundary conditions at so-constructed complicated volumetric structural model.

ACKNOWLEDGMENT

This research is currently supported by the National Science Foundation of China (Contract No. 50876024).

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