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Critical review of the definitions of the Bejan number - first law of thermodynamics
International Communications in Heat and Mass Transfer, 2021Abstract This paper is an extension of our recently published paper (Zimparov et al., 2020 [ 1 ]), proving that the unique form of the Bejan number (Be) is derived from the classic fluid mechanics and that the other forms, derived from the first law of thermodynamics (related to the convection heat or mass transfer), are combination of unique Bejan ...
Ventsislav D. Zimparov +2 more
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Comments on “New insight into the definitions of the Bejan number”
International Communications in Heat and Mass Transfer, 2021Abstract These notes aim to increase the awareness of the concept of Bejan Number among the readers of International Communications in Heat and Mass Transfer. They refer to the paper of Zimparov et al. because the authors, in their outstanding commentary on Bejan number neglect both the possible confusion which may arise between Hagen Number and ...
Michele Trancossi +2 more
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New insight into the definitions of the Bejan number
International Communications in Heat and Mass Transfer, 2020Abstract This paper presents new insight concerning the formulation and definition of one of the two Bejan numbers (Be) derived from the first and second law analysis, namely this one derived from the first law of thermodynamics. The systematic analysis performed reveals the role and physical meaning of the Bejan number (Be) as criterion of ...
Ventsislav D. Zimparov +2 more
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The science and the history of the two Bejan numbers
International Journal of Heat and Mass Transfer, 2016Abstract In this note, a historical view on the Bejan numbers (Be) is presented. There are two definitions of Bejan number (Be) in the fields of thermodynamics, fluid mechanics, heat transfer, and mass transfer. A general form of Bejan number (Be) is introduced, and application of Bejan number (Be) to flows in porous media is shown.
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Numerical Heat Transfer, Part B: Fundamentals
This article aims to investigate the electrokinetic peristaltic flow of the Sutterby nanofluid through an asymmetric microchannel with a porous medium and the Joule heating parameter. The magnetic field is applied in the transverse direction and the electric field on the flow direction.
P. Praveen Kumar +4 more
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This article aims to investigate the electrokinetic peristaltic flow of the Sutterby nanofluid through an asymmetric microchannel with a porous medium and the Joule heating parameter. The magnetic field is applied in the transverse direction and the electric field on the flow direction.
P. Praveen Kumar +4 more
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International Communications in Heat and Mass Transfer, 2018
Abstract In this work, the effects of the pressure drop (i.e. the Bejan number in dimensionless term) and of the Prandtl number have been investigated with reference to optimal geometries for maximizing the heat transfer density under forced convection of shear thinning fluids.
Klein, R. J. +3 more
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Abstract In this work, the effects of the pressure drop (i.e. the Bejan number in dimensionless term) and of the Prandtl number have been investigated with reference to optimal geometries for maximizing the heat transfer density under forced convection of shear thinning fluids.
Klein, R. J. +3 more
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Response to “Comments on “New insight into the definitions of the Bejan number””
International Communications in Heat and Mass Transfer, 2021Abstract The present paper is a response to “Comments on “New insight into the definitions of the Bejan number”” [1] and aims at to increase the acquaintance of the readers of the International Communications of Heat and Mass Transfer, with the unique Bejan number and its scope of implementation.
Ventsislav D. Zimparov +2 more
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