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Simulation of Convective Drying of Wet Porous Materials,

Hashimoto, A; Stenström, Stig LU and Kameoka, T (2003) In Drying Technology 21(8). p.1411-1431
Abstract
A simulation model for convective drying of wet porous materials was developed. For the simulation, we measured the moisture diffusivities within them and applied a modified Dubinin-Astakhov equation to the moisture sorption data for a membrane filter. The simulation results not accounting for internal mass transfer resistance were quite different from the experimental ones. The drying characteristics calculated by a shrinking core model with effective moisture diffusivity represented a much lower drying rate and much higher temperatures, respectively, than the experimental ones. This meant that we must consider the plural moisture transport mechanisms within the samples. Therefore, we calculated the drying rate and temperatures with an... (More)
A simulation model for convective drying of wet porous materials was developed. For the simulation, we measured the moisture diffusivities within them and applied a modified Dubinin-Astakhov equation to the moisture sorption data for a membrane filter. The simulation results not accounting for internal mass transfer resistance were quite different from the experimental ones. The drying characteristics calculated by a shrinking core model with effective moisture diffusivity represented a much lower drying rate and much higher temperatures, respectively, than the experimental ones. This meant that we must consider the plural moisture transport mechanisms within the samples. Therefore, we calculated the drying rate and temperatures with an apparent overall mass transfer coefficient damping with a decrease in the moisture content. The results accounting for the hygroscopic effects broadly agreed with the experimental ones by the evaluation. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Drying Technology
volume
21
issue
8
pages
1411 - 1431
publisher
TAPPI
external identifiers
  • wos:000185970900003
  • scopus:0345392762
ISSN
1532-2300
DOI
language
English
LU publication?
yes
id
b446f3e5-3467-4094-bc51-8ef4a0e37d6b (old id 129305)
date added to LUP
2007-06-25 11:11:00
date last changed
2018-05-29 12:23:06
@article{b446f3e5-3467-4094-bc51-8ef4a0e37d6b,
  abstract     = {A simulation model for convective drying of wet porous materials was developed. For the simulation, we measured the moisture diffusivities within them and applied a modified Dubinin-Astakhov equation to the moisture sorption data for a membrane filter. The simulation results not accounting for internal mass transfer resistance were quite different from the experimental ones. The drying characteristics calculated by a shrinking core model with effective moisture diffusivity represented a much lower drying rate and much higher temperatures, respectively, than the experimental ones. This meant that we must consider the plural moisture transport mechanisms within the samples. Therefore, we calculated the drying rate and temperatures with an apparent overall mass transfer coefficient damping with a decrease in the moisture content. The results accounting for the hygroscopic effects broadly agreed with the experimental ones by the evaluation.},
  author       = {Hashimoto, A and Stenström, Stig and Kameoka, T},
  issn         = {1532-2300},
  language     = {eng},
  number       = {8},
  pages        = {1411--1431},
  publisher    = {TAPPI},
  series       = {Drying Technology},
  title        = {Simulation of Convective Drying of Wet Porous Materials,},
  url          = {http://dx.doi.org/},
  volume       = {21},
  year         = {2003},
}