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Main Title: A Numerical Implementation of the Soret Effect in Drying Processes
Author(s): Häussling Löwgren, Bartolomeus
Bergmann, Julius
Alves-Filho, Odilio
Type: Article
Language Code: en
Abstract: Drying of porous media is strictly governed by heat and mass transfer. However, contrary to the definition that drying is simultaneous transport mechanisms of heat and mass, most past and current models either account for temperature or concentration gradient effects on drying. Even though the complexity of computations of these processes varies with area of application, in most cases, the Dufour and Soret effects are neglected. This leads to deviations and uncertainties on the assumptions and interpretations of these and other relevant effects on drying. This paper covers the theoretical methods to derive the coupled transfer effects. In addition, this work proposes and formulates relevant heat and mass transfer equations, as well as the governing equations for drying processes with Dufour and Soret effects. The application of a numerical approach to solve the equations allows for studying of the influence of these effects on the design and operation of dryers. It is shown that the Soret effect can be highly relevant on drying operations with dynamic heating operation. While for drying processes where the steady state drying process predominates, the effect is deemed negligible.
Issue Date: 17-Feb-2020
Date Available: 28-Apr-2020
DDC Class: 660 Chemische Verfahrenstechnik
Subject(s): Soret effect
nonequilibrium thermodynamics
numerical simulation
Journal Title: ChemEngineering
Publisher: MDPI
Publisher Place: Basel
Volume: 4
Issue: 1
Article Number: 13
Publisher DOI: 10.3390/chemengineering4010013
EISSN: 2305-7084
Appears in Collections:FG Dynamik und Betrieb technischer Anlagen » Publications

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