Abstract
We have studied the imbibition of water from a stationary nozzle into thin, moving porous media that are suspended in air, as well as the accompanying evaporation and condensation processes. Due to sorptive heating and the latent heat associated with the phase change processes, the temperature of the porous medium becomes non-uniform. We have measured the temperature distributions using infrared thermography as a function of substrate speed. Moreover, we developed a numerical model coupling Darcy flow and heat transfer in the thin porous medium with gas flow, heat and water vapor transport in the surrounding gas phase. The numerical simulations reproduce the measurements very well and point at an intricate buoyancy-induced gas-phase convection pattern.
| Language | English |
|---|---|
| Article number | 118875 |
| Number of pages | 10 |
| Journal | International Journal of Heat and Mass Transfer |
| Volume | 147 |
| DOIs | |
| State | Published - 31 Oct 2019 |
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Keywords
- Heat of wetting
- Infrared thermography
- Moisture distributions
- Porous media
- Sorption
Cite this
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Infrared thermography of sorptive heating of thin porous media : experiments and continuum simulations. / Murali, Vignesh; Zeegers, Jos; Darhuber, Anton.
In: International Journal of Heat and Mass Transfer, Vol. 147, 118875, 31.10.2019.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Infrared thermography of sorptive heating of thin porous media
T2 - International Journal of Heat and Mass Transfer
AU - Murali,Vignesh
AU - Zeegers,Jos
AU - Darhuber,Anton
PY - 2019/10/31
Y1 - 2019/10/31
N2 - We have studied the imbibition of water from a stationary nozzle into thin, moving porous media that are suspended in air, as well as the accompanying evaporation and condensation processes. Due to sorptive heating and the latent heat associated with the phase change processes, the temperature of the porous medium becomes non-uniform. We have measured the temperature distributions using infrared thermography as a function of substrate speed. Moreover, we developed a numerical model coupling Darcy flow and heat transfer in the thin porous medium with gas flow, heat and water vapor transport in the surrounding gas phase. The numerical simulations reproduce the measurements very well and point at an intricate buoyancy-induced gas-phase convection pattern.
AB - We have studied the imbibition of water from a stationary nozzle into thin, moving porous media that are suspended in air, as well as the accompanying evaporation and condensation processes. Due to sorptive heating and the latent heat associated with the phase change processes, the temperature of the porous medium becomes non-uniform. We have measured the temperature distributions using infrared thermography as a function of substrate speed. Moreover, we developed a numerical model coupling Darcy flow and heat transfer in the thin porous medium with gas flow, heat and water vapor transport in the surrounding gas phase. The numerical simulations reproduce the measurements very well and point at an intricate buoyancy-induced gas-phase convection pattern.
KW - Heat of wetting
KW - Infrared thermography
KW - Moisture distributions
KW - Porous media
KW - Sorption
UR - http://www.scopus.com/inward/record.url?scp=85074129362&partnerID=8YFLogxK
U2 - 10.1016/j.ijheatmasstransfer.2019.118875
DO - 10.1016/j.ijheatmasstransfer.2019.118875
M3 - Article
VL - 147
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
SN - 0017-9310
M1 - 118875
ER -