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TECHNICAL PAPERS: Porous Media

Influence of Irradiation Time, Particle Sizes, and Initial Moisture Content During Microwave Drying of Multi-Layered Capillary Porous Materials

[+] Author and Article Information
P. Ratanadecho, K. Aoki, M. Akahori

Department of Mechanical Engineering, Nagaoka University of Technology, 1603-1, Kamitomioka, Nagaoka, Niigata, 940-2188, Japan

J. Heat Transfer 124(1), 151-161 (Sep 10, 2001) (11 pages) doi:10.1115/1.1423951 History: Received April 10, 2001; Revised September 10, 2001
Copyright © 2002 by ASME
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References

Figures

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Schematic of experimental facility: (a) equipment setup; and (b) multi-layered porous packed bed (Sample)
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Typical relationship between, pc and se
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Distribution of electric field for case of a rectangular waveguide is empty (x=54.61 mm)
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Distribution of electric field for the sample inserted in the rectangular waveguide (t=15 min,x=54.61 mm)
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Distribution of electric field for the sample inserted in the rectangular waveguide (t=540 min,x=54.61 mm)
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Temperature profile in times at various depths (P=50 W,d=0.15 mm,s0=1.0): (a) experiment; and (b) simulation
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Temperature profile in times at various depths (P=50 W,d=0.15 mm,s0=0.6): (a) experiment; and (b) simulation
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Temperature profile in times at various depths (Experiment: P=50 W,d=1.0 mm,s0=1.0)
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Microwave power absorbed profile in times: (Simulation P=50 W,d=0.15 mm)
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Comparison between simulated results (a) and experimental results (b) of temperature distribution (°C) within the sample (s0=1.0,t=120 min,d=0.15 mm, dimensions: 110 mm (x) ×50 mm (z))
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Comparison between simulated results (a) and experimental results (b) of temperature distribution (°C) within the sample (s0=0.6,t=120 min,d=0.15 mm, dimensions: 110 mm (x) ×50 mm (z))
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Water saturation as a function of depth at various times (P=50 W,d=0.15 mm,s0=1.0)
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Water saturation as a function of depth at various times (P=50 W,d=0.15 mm,s0=0.6)
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The simulated water saturation distributions (dimensionless) within the sample (s0=1.0, time=120 min, d=0.15 mm, Dimensions: 110 mm (x) ×50 mm (z))
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The simulated water saturation distributions (dimensionless) within the sample, (s0=0.6, time=120 min, d=0.15 mm, Dimensions: 110 mm (x) ×50 mm (z))
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The variation of drying rate with respect to time
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water saturation as a function of depth for F-C Bed (Experiment: P=50 W,t=360 min))
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Temperature as a function of depth at various times for F-C Bed (Experiment: P=50 W,t=360 min))
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water saturation as a function of depth for C-F Bed (Experiment: P=50 W,t=360 min))
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Temperature as a function of depth at various times for C-F Bed (Experiment: P=50 W,t=360 min))

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