Non-Darcian Forced Convection Analysis in an Annulus Partially Filled With a Porous Material

Chikh, Salah; Boumedien, A.; Bouhadef, Khedidja; Lauriat, Guy

doi:10.1080/10407789508913770

Cited by 52 publications

(17 citation statements)

References 13 publications

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“…4b. It is clear that the velocity profiles by the generalized BFD model in the porous layer are more uniform, which was confirmed also in Chikh et al (1995). This is due to the fact that the inertial force in Eq.…”

Section: Resultssupporting

confidence: 69%

“…The inertial coefficient B in the second term is an empirical function depending on the microstructure of the porous medium, and several formulae have appeared in the literature (Bejan, 1987;Chikh et al, 1995;Marafie and Vafa, 2001;Poulikakos and Renken, 1987;Vafai and Kim, 1990). In the fluid duct, the source term S di becomes zero because the permeability is infinite and B is zero.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…References (Bejan, 1987;Chikh et al, 1995;Marafie and Vafai, 2001;Vafai and Kim, 1994) BFD-2 B ¼ 1.75(1 À ")/(" 3 d) (Vafai and Kim, 1990) model 1, and both are adopted in the study. Because the inertial effects are of main interest, a parameter study has also been conducted, see next section for details.…”

Section: Model the Inertial Coefficientmentioning

confidence: 99%

“…Fundamental studies of forced convective heat transfer in porous media have attracted attention of various investigators in recent years (Alazmi and Vafai, 2001;Alkam et al, 2001;Bejan, 1987;Chikh et al, 1995;Comiti et al, 2000;Marafie and Vafai, 2001;Poulikakos and Renken, 1987;Teng and Zhao, 2000;Kim, 1990, 1994). This is so because a better understanding of thermal engineering applications is required where porous materials are present.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Numerical Analysis of Heat Transfer and Gas Flow in PEM Fuel Cell Ducts by a Generalized Extended Darcy Model

Yuan¹,

Sundén²

2004

International Journal of Green Energy

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In this work, gas flow and heat transfer have been numerically investigated and analyzed for both cathode/anode ducts of proton exchange membrane (PEM) fuel cells. The simulation is conducted by solving a set of conservation equations for the whole domain consisting of a porous medium, solid structure, and flow duct. A generalized extended Darcy model is employed to investigate the flow inside the porous layer. This model accounts for the boundary-layer development, shear stress, and microscopic inertial force as well. Effects of inertial coefficient, together with permeability, effective thermal conductivity, and thickness of the porous layer on gas flow and heat transfer are investigated.

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Section: Resultssupporting

confidence: 69%

Section: Mathematical Modelmentioning

confidence: 99%

Section: Model the Inertial Coefficientmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical Analysis of Heat Transfer and Gas Flow in PEM Fuel Cell Ducts by a Generalized Extended Darcy Model

Yuan¹,

Sundén²

2004

International Journal of Green Energy

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“…With the help of the Darcy-Brinkman model, analytical solutions were obtained by Chikh et al (1995b) for the problem of forced convection in an annular duct partially filled with a porous medium. The same problem was investigated numerically by the same group based on the Darcy-Brinkman-Forchheimer model (Chikh et al 1995a). The transient behavior of a flow inside a parallel-plate channel partially filled with porous media was investigated by Al-Nimr and Alkam (1997bAlkam ( , 1998.…”

mentioning

confidence: 98%

The Use of Porous Fins for Heat Transfer Augmentation in Parallel-Plate Channels

Hamdan

Al‐Nimr

2009

Transp Porous Med

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In this study, a steady, fully developed laminar forced convection heat augmentation via porous fins in isothermal parallel-plate duct is numerically investigated. High-thermal conductivity porous fins are attached to the inner walls of two parallel-plate channels to enhance the heat transfer characteristics of the flow under consideration. The DarcyBrinkman-Forchheimer model is used to model the flow inside the porous fins. This study reports the effect of several operating parameters on the flow hydrodynamics and thermal characteristics. This study demonstrates, mainly, the effects of porous fin thickness, Darcy number, thermal conductivity ratio, Reynolds number, and microscopic inertial coefficient on the thermal performance of the present flow. It is found that the highest Nusselt number is achieved at fully filled porous duct which requires the highest pumping pressure. The results show that using porous fins requires less pumping pressure with comparable high heat augmentation weight against fully filled porous duct. It is found that higher Nusselt numbers are achieved by increasing the microscopic inertial coefficient (A), the Reynolds number (Re), and the thermal conductivity of the porous substrate k 2 . The results show that heat transfer can be enhanced (1) with the use of high thermal conductivity fins, (2) by decreasing the Darcy number, and (3) by increasing microscopic inertial coefficient.

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Forced convection and entropy generation inside a channel with a heat‐generating porous block

Delavar

Hedayatpour

2012

Heat Trans. Asian Res.

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The flow pattern and heat transfer in a composite system containing a porous region has received considerable attention due to its importance in many engineering applications. In this study a thermal lattice Boltzmann model with nine velocities, D2Q9, is employed to investigate the fluid flow, heat transfer, and entropy generation inside a channel with a heat‐generating porous block. The effects of the porous block's length, porosity, and the Reynolds number, overflow pattern, heat transfer, and entropy generation were studied. The mentioned parameters have different effects on heat transfer and conjugate phenomena. By increasing the block length, Reynolds number, and porosity the dimensionless entropy generation will reduce. © 2012 Wiley Periodicals, Inc. Heat Trans Asian Res; Published online in Wiley Online Library (wileyonlinelibrary.com/journal/htj). DOI 10.1002/htj.21017

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Non-Darcian Forced Convection Analysis in an Annulus Partially Filled With a Porous Material

Cited by 52 publications

References 13 publications

Numerical Analysis of Heat Transfer and Gas Flow in PEM Fuel Cell Ducts by a Generalized Extended Darcy Model

Numerical Analysis of Heat Transfer and Gas Flow in PEM Fuel Cell Ducts by a Generalized Extended Darcy Model

The Use of Porous Fins for Heat Transfer Augmentation in Parallel-Plate Channels

Forced convection and entropy generation inside a channel with a heat‐generating porous block

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