Results 11 to 20 of about 11,335 (180)
A new definition of Bejan number [PDF]
Thermal Science, 2012 A new definition of Bejan number will be generated by replacing the thermal diffusivity with the mass diffusivity. For example, the Schmidt number is the mass transfer analog of the Prandtl number. For the case of Reynolds analogy (Sc = Pr = = 1), both current and new definitions of Bejan number are the same.
Awad Mohamed M.
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Hagen number versus Bejan number [PDF]
Thermal Science, 2013 This study presents Hagen number vs. Bejan number. Although their physical meaning is not the same because the former represents the dimensionless pressure gradient while the latter represents the dimensionless pressure drop, it will be shown that Hagen number coincides with Bejan number in cases where the characteristic length (l) is equal
Awad Mohamed M.
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Extending the Bejan number to a general form
Thermal Science, 2013 A modified form of the Bejan number (Be), originally proposed by Bhattacharjee and Grosshandler for momentum processes, is obtained by replacing the dynamic viscosity (m) appearing in the original proposition with the equivalent product of the fluid density (r) and the momentum diffusivity of the fluid (n).
Mohamrd Awad, Jose Lage
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Unsteady MHD Non-Newtonian Heat Transfer Nanofluids with Entropy Generation Analysis [PDF]
Nonlinear Engineering, 2019 A theoretical study of unsteady magnetohydrodynamic boundary layer stagnation point flow, heat and mass transfer of a second grade electrically-conducting nanofluid from a horizontal stretching sheet with thermal slip and second order slip velocity ...
Shukla Nisha, Rana Puneet, Bég O. Anwar
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Nanomaterials, 2022 The present paper explores the two-dimensional (2D) incompressible mixed-convection flow of magneto-hydrodynamic Eyring–Powell nanofluid through a nonlinear stretching surface in the occurrence of a chemical reaction, entropy generation, and Bejan number
Salman Saleem +6 more
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Case Studies in Thermal Engineering, 2022 Natural convection heat transfer in a porous prismatic enclosure emplacing two movable hot baffles may well be executed in this research. The domain may be loaded with ternary hybrid nanofluid and the governing energy and Navier-Stokes equations might ...
Yabin Shao +5 more
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Ain Shams Engineering Journal, 2023 Entropy generation and triple diffusive convection is not explored yet taking the combined effects of suction and magnetohydrodynamic in a flow through porous medium.
Xianqin Zhang +7 more
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Thermal Science, 2021 This work is a continuation of the recent studies [1, 2], revealing that the unique form of the Bejan number is robust (unchangeable) and appears independently in all Hagen-Poiseuille fluid-flows with heat or mass transfer by convection. The other dimensionless groups, derived from the First law of thermodynamics (related to the convection ...
Ventsislav Zimparov +2 more
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Entropy Generation and Bejan Number Analysis of MHD Casson Fluid Flow in a Micro-Channel with Navier Slip and Convective Boundary Conditions [PDF]
International Journal of Thermofluid Science and Technology, 2020 The analysis of MHD flow has been a concern of consideration for research scientists and engineers. In this treatise, the steady MHD flow of an incompressible and electrically conducting Casson fluid in a micro-channel with heat generation and viscous dissipation, in the presence of hydrodynamic slip and convective boundary conditions, is examined ...
M. Venkateswarlu, P. Bhaskar
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Advances in Mechanical Engineering, 2022 The current investigation deals with entropy analysis for radiative flow of nanomaterials between two heated rotating disks. Titanium ( Ti O 2 and GO ) and Graphene oxides are taken as nanoparticles. Water ( H 2 O ) is used as a conventional base liquid.
Tasawar Hayat +3 more
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