The science and the history of the two Bejan numbers. (March 2016)

• Record Type: Journal Article
• Authors: Awad, M.M.
• Is Part Of: International journal of heat and mass transfer. Volume 94(2016:Mar.)
• Page Start: 101
• Page End: 103
• Publication Date: 2016-03
• Subjects: Bejan number -- Thermodynamics -- Fluid mechanics -- Heat transfer -- Mass transfer -- Porous media; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Electronic journals; 621.4022
• DOI: 10.1016/j.ijheatmasstransfer.2015.11.073
• Languages: English
• ISSNs: 0017-9310

Abstract

Highlights: 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. Application of Bejan number ( Be ) to flows in porous media is shown. Criticism of the view that Be = Eu · Re 2 is presented. Abstract: 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. The note concludes with a critical discussion of the view that Bejan number in convection ( Be ) is the combination of the Euler ( Eu ) and Reynolds ( Re ) numbers.