Transient Thermal Behavior and Stress Development within a Cylindrical Wooden Disk during Drying in a Fluidized Bed Dryer |
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| Authors: | M. Sreekanth Ajit Kumar Kolar |
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| Affiliation: | 1. Heat Transfer and Thermal Power Laboratory, Department of Mechanical Engineering , Indian Institute of Technology Madras , Chennai, India sreekanth_sun@yahoo.com;3. Heat Transfer and Thermal Power Laboratory, Department of Mechanical Engineering , Indian Institute of Technology Madras , Chennai, India |
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| Abstract: | Thermal behavior and stresses developed in a wood particle are predicted using a mathematical model formulated for drying in fluidized bed. Drying experiments have been carried out on 10 mm long and 30 mm diameter cylindrical disks at a bed temperature of 403 K (130°C). Drying time, mass reduction, and shrinkage during drying have been measured and used to validate the thermal model. The stress model is validated with an analytical solution available in literature. The drying time is experimentally found to be 630 s. The wood particle shrinks by 4.6% in the radial direction and by 1.0% in the longitudinal direction. The model indicates splitting failure at the circumference, which was also noticed during experiments. |
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| Keywords: | Cylindrical disk Drying Fluidized bed Model Stress Wood |
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