Infrared thermography of sorptive heating of thin porous media: experiments and continuum simulations

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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.

Originele taal-2Engels
Artikelnummer118875
Aantal pagina's10
TijdschriftInternational Journal of Heat and Mass Transfer
Volume147
DOI's
StatusGepubliceerd - 31 okt 2019

Vingerafdruk

Porous materials
continuums
Heating
heating
Gases
vapors
vapor phases
simulation
Experiments
Latent heat
Steam
latent heat
Buoyancy
buoyancy
Water vapor
nozzles
gas flow
Flow of gases
water vapor
Numerical models

Citeer dit

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title = "Infrared thermography of sorptive heating of thin porous media: experiments and continuum simulations",
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.",
keywords = "Heat of wetting, Infrared thermography, Moisture distributions, Porous media, Sorption",
author = "Vignesh Murali and Jos Zeegers and Anton Darhuber",
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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.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

TY - JOUR

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T2 - experiments and continuum simulations

AU - Murali, Vignesh

AU - Zeegers, Jos

AU - Darhuber, Anton

PY - 2019/10/31

Y1 - 2019/10/31

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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

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