Application of full-spectrum k-distribution method to combined non-gray radiation and forced convection flow in a duct with an expansion

Atashafrooz, Meysam; Nassab, S. A. Gandjalikhan; Lari, Khosro

doi:10.1007/s12206-015-0148-4

Cited by 12 publications

(4 citation statements)

References 45 publications

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“…Niemann et al [23] studied the impact of buoyancy effects on the velocity field and on turbulent heat transfer in the mixed regime by comparing two simulations, one with the buoyancy term removed from the equations and the other with a Richardson number of 0.338. On an inclined step in an inclined duct, Atashafrooz [24] presented the influence of buoyancy force on nanofluid flow in mixed MHD convection and entropy generation where the interaction of several parameters is studied, in an abruptly contracting duct [25], in a trapezoidal recess [26], and in three-dimensional forced convection [27], radiative heat transfer plays an important role in thermal behavior, so considering the interactions between the different radiative and convective (or conductive) heat transfer mechanisms can improve simulation precision [28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Effect of the inclination angle of finned cylinder over a BFS on the MHD behavior in the presence of a nanofluid

Derbal

Bouzit

2022

Metall Mater Eng

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The present numerical study is based on the forced magnetohydrodynamic (MHD) convection of a ferrofluid through a backward facing step (BFS). A cylinder with two fixed fins and fixed dimensions is implanted inside fluid. The dimensionless governing equations have been solved using the multigrid finite element method. Several parameters were considered, such as the Hartmann number 0≤ Ha ≤100, the magnetic field inclination angle 0°≤ ɣ ≤90°, the Reynolds number 10≤ Re ≤200, the nanoparticle volume fraction 0%≤ φ ≤10%, and the fins inclination angle 0°≤ a ≤180°. The results have shown that the presence of the fins improves the heat transfer, especially at the position a = 90° where the Nuave number increases with a ratio of 113% for Re = 200.

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Section: Introductionmentioning

confidence: 99%

Effect of the inclination angle of finned cylinder over a BFS on the MHD behavior in the presence of a nanofluid

Derbal

Bouzit

2022

Metall Mater Eng

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“…The authors concluded that with the right choice of parameters a porous fin can transfer heat at a higher rate as compared to their solid counterparts. A number of applications are encountered in practice, 13–16 where heat transfer takes place by radiation along with convection. Here it is worth mentioning that back in 2016, Singh et al.…”

Section: Introductionmentioning

confidence: 99%

A modified firefly algorithm to maximize heat dissipation of a rectangular porous fin in heat exchangers exposed to both convective and radiative environment

Deshamukhya

Nath

Hazarika

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part E:

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The current study deals with the optimization of significant parameters of aluminium and copper rectangular porous fins using firefly algorithm with reflective boundary condition. The study has been done considering convective heat transfer, in the first case, as well as combined convective and radiative modes of heat transfer, in the second case. To solve the non-linear governing equation, a semi analytical technique, differential transformation method is adopted. The results obtained by differential transformation method are validated by the numerical solution obtained by the finite difference method. The performance of firefly algorithm is evaluated by comparing with the results obtained by particle swarm optimization where it is seen that for the current set of equations, firefly algorithm took lesser number of iterations and computational time to converge than particle swarm optimization for all the cases. The analysis has been done for three different fin volumes and the effect of important variables which directly influence the heat transfer rate through porous fins has been discussed.

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“…Analysis of the hydrodynamic and thermal behaviors of the step flows has been extensively studied during last decades (Iwai et al 2000, Uruba et al 2007, Nie et al 2009, Selimefendigil and Oztop 2013, Atashafrooz et al 2015, Selimefendigil and Oztop 2016. This continued attention is actually due to the important influence of this type of flow in the design of many engineering equipment, such as combustion chambers, power generating equipment, cooling of electronic systems, and heat exchangers.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Buoyancy Force on the Irreversibility of Three-Dimensional Step Flow in an Inclined Duct

Atashafrooz¹,

Asadi²

2019

JSSCM

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This research deals with the study of the irreversibility of three-dimensional mixed convection flow in an inclined duct with step. To reach this goal, an analysis of entropy generation is carried out according to the second law of thermodynamics. The effects of buoyancy force on the flow irreversibility are analyzed with all details. The results show that the values of entropy generation number and Bejan number are intensively dependent on the Grashof number and duct inclination angle, so that the effects of Grashof number on the mentioned parameters are much higher for the vertical ducts.

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Application of full-spectrum k-distribution method to combined non-gray radiation and forced convection flow in a duct with an expansion

Cited by 12 publications

References 45 publications

Effect of the inclination angle of finned cylinder over a BFS on the MHD behavior in the presence of a nanofluid

Effect of the inclination angle of finned cylinder over a BFS on the MHD behavior in the presence of a nanofluid

A modified firefly algorithm to maximize heat dissipation of a rectangular porous fin in heat exchangers exposed to both convective and radiative environment

The Effects of Buoyancy Force on the Irreversibility of Three-Dimensional Step Flow in an Inclined Duct

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