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Experimental Investigation of Drying in a Model Porous Medium: Influence of Thermal Gradients

Vorhauer, Nicole and Tran, Q.T. and Metzger, Thomas and Tsotsas, Evangelos and Prat, Marc Experimental Investigation of Drying in a Model Porous Medium: Influence of Thermal Gradients. (2013) Drying Technology , 31 (8). 920-929. ISSN 0737-3937

(Document in English)

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Official URL: http://dx.doi.org/10.1080/07373937.2012.724750


In this study, isothermal and non-isothermal drying experiments with imposed constant temperature gradients h network of borosilicate glass (SiO2)with interconnected etched channels. In experiments with temperature decreasing from the open surface of the pore network, a travelling stabilized gas-liquid region could be established, while in isothermal experiments with uniform temperature faster breakthrough and an extended two-phase zone were observed. Both findings are in good agreement with pore network simulations. However, numerical underestimation of drying rates (especially in the second period of drying) indicates that liquid films might play a major role in the experimental pore networks, even in the presence of thermal gradients.

Item Type:Article
Additional Information:Thanks to Taylor & Francis editor. The definitive version is available at http://www.tandfonline.com The original PDF of the article can be found at Drying Technology website : http://dx.doi.org/10.1080/07373937.2012.724750
HAL Id:hal-03467246
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Otto Von Guericke Universität Magdeburg - OVGU (GERMANY)
Laboratory name:
Deposited On:28 Feb 2014 15:11

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