Two-dimensional heat and mass transfer and thermodynamic analyses of porous microreactors with Soret and thermal radiation effects: An analytical approach

Hunt, G. , Torabi, M., Govone, L., Karimi, N. and Mehdizadeh, A. (2018) Two-dimensional heat and mass transfer and thermodynamic analyses of porous microreactors with Soret and thermal radiation effects: An analytical approach. Chemical Engineering and Processing: Process Intensification, 126, pp. 190-205. (doi:10.1016/j.cep.2018.02.025)

Hunt, G. , Torabi, M., Govone, L., Karimi, N. and Mehdizadeh, A. (2018) Two-dimensional heat and mass transfer and thermodynamic analyses of porous microreactors with Soret and thermal radiation effects: An analytical approach. Chemical Engineering and Processing: Process Intensification, 126, pp. 190-205. (doi:10.1016/j.cep.2018.02.025)

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Abstract

Transport of heat and mass and the thermodynamics of porous microreactors with thermal diffusion and radiation effects are investigated analytically. The examined configuration includes an axisymmetric, thick-wall microchannel with an iso-flux thermal boundary condition imposed on the external surfaces. The microchannel is filled with porous materials and accommodates a zeroth order homogenous chemical reaction. Internal radiative heat transfer is modelled in addition to heat convection and conduction, while the local thermal non-equilibrium approach is taken within the porous section of the system. The transport of species is coupled with that of heat via the inclusion of thermodiffusion or Soret effect. Two-dimensional heat and mass transfer differential equations are solved analytically. The results are subsequently used to predict the thermodynamic irreversibilities inside the reactor and a thorough analysis of local and total entropy generation rates is performed. Also, the changes in Nusselt number, calculated on the internal walls of the microreactor, versus various parameters are reported. It is shown that the radiation effects can impact the temperature of the solid phase of the porous medium and lead to alteration of Nusselt number. It is further observed that the transfer of mass is the main source of irreversibility in the system. The findings are of particular use for the design and analysis of the microreactors with homogenous chemical reactions and can be also used for the validation of computational models.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hunt, Graeme and Karimi, Dr Nader and Govone, Mr Lilian
Authors: Hunt, G., Torabi, M., Govone, L., Karimi, N., and Mehdizadeh, A.
College/School:College of Science and Engineering > School of Engineering
College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Chemical Engineering and Processing: Process Intensification
Publisher:Elsevier
ISSN:0255-2701
ISSN (Online):1873-3204
Published Online:01 March 2018
Copyright Holders:Copyright © 2018 Elsevier
First Published:First published in Chemical Engineering and Processing: Process Intensification 126: 190-205
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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