Investigation of a Confined Laminar Impinging Jet on a Plate with a Porous Layer Using the Preconditioned Density-Based Algorithm

Zhang, H. J.; Zou, Zhengping

doi:10.1080/10407782.2012.648024

Cited by 8 publications

(4 citation statements)

References 48 publications

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“…The previous studies [20,26,27] indicate that the numerical method adopted in this article is suitable for the simulation of the coupled fluid flow and heat transfer problems in hybrid porous=fluid=solid domains. Because the fluid flow and heat transfer problem in a channel with porous=solid ribs is relatively complicated, the present code was further validated against the previous results of Li et al [16].…”

Section: Code Validationmentioning

confidence: 99%

Investigations of Heat Transfer Enhancement in a Channel with Staggered Porous Ribs by the Preconditioned Density-Based Algorithm

Zhang

Zou

Shao

et al. 2015

Numerical Heat Transfer, Part A: Applications

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The preconditioned density-based algorithm and two-domain approach were used to investigate the fluid flow and heat transfer characteristics in a channel with staggered porous/solid ribs. In the porous zone, the momentum equations were formulated by the Darcy-BrinkmanForchheimer model; and the local thermal equilibrium (LTE) model was adopted for energy equation. At the porous/fluid interface, the stress-continuity interfacial condition was utilized. The governing equations are solved by the preconditioned density-based control-volume method, with preconditioning matrix for equations of porous domain adopted, aiming to eliminate the equation stiffness of the porous seepage flow. The effects of Reynolds number, geometry parameters of ribs (rib length and thickness), and physical property of porous media (permeability and porosity) on the flow pattern and heat transfer performance were analyzed. Results indicate that, compared with that of solid ribs, the recirculating bubble behind the porous ribs is completely detached from it because of the permeability of porous media, and the size of the recirculating bubble is suppressed. The parameters that would affect the mass flow of fluid penetrating the porous ribs, including permeability, Reynolds number, baffle length and thickness, have remarkable influence on the flow pattern. All the aforementioned parameters would affect the local heat transfer performance.

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Section: Code Validationmentioning

confidence: 99%

Investigations of Heat Transfer Enhancement in a Channel with Staggered Porous Ribs by the Preconditioned Density-Based Algorithm

Zhang

Zou

Shao

et al. 2015

Numerical Heat Transfer, Part A: Applications

Self Cite

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show abstract

“…The generalized Darcy-Forchheimer-Brinkman model is adopted to model the flow in porous medium, where both inertia and viscosity effects are considered. The generalized model for the description of heat and fluid flow through saturated porous media consist a set of conservation equations, that can be derived by averaging the Navier-Stokes equations over a representative elementary volume, using well known volume averaging procedure as follows [18,28]:…”

Section: Governing Equationsmentioning

confidence: 99%

“…Jeng et al [22] experimentally studied heat transfer characteristics in a 180-deg turn around channel with discrete aluminum-foam blocks. Rong [25][26][27][28]. de Lemos and Fischer [26] performed analysis on jet impingement heat transfer on a flat plate with and without porous layer with Local Thermal Equilibrium (LTE) assumption.…”

Section: Introductionmentioning

confidence: 99%

“…It was found that, at low values of thermal conductivity ratio ðk s =k f Þ of porous layer Local Thermal Equilibrium (LTE) is realistic where the temperature of saturated fluid and solid matrix were of same order. Zhang and Zou [28] investigated the effects of Reynolds number, porosity, Darcy number, thermal conductivity ratio, Biot number, and porous layer thickness on the flow pattern and local heat transfer performance for an impinging jet using the preconditioned density-based algorithm. Kamath et al [29] performed experimental investigation on convective heat transfer in a vertical channel with three discrete heat sources and found a significant heat transfer enhancement in the form of drop in temperature.…”

Section: Introductionmentioning

confidence: 99%

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A numerical investigation of heat transfer and entropy generation during jet impingement cooling of protruding heat sources without and with porous medium

Lam

Prakash

2015

Energy Conversion and Management

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Numerical simulation of an impinging jet array in a square channel covered by a porous layer

Khademi,

Bazargan

2024

Heat Trans

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In many heat transfer applications, the design of the flow field should warrant high heat transfer rates and, meanwhile, reduce the thermal stresses so that hot spots along the heat transfer surface be avoided. A combination of multiple jets impinging on a channel bed together with the surface covered by a porous layer is proposed to satisfy both objectives in the current study. A three‐dimensional numerical simulation using a finite volume method with the second‐order discretization has been applied to visualize the multiple‐impinging jet flow behavior. The impacts of the porous medium parameters, including the thickness, permeability, and porosity, on the magnitude and distribution of the heat transfer along the channel bed have been evaluated. It is shown that the overall heat transfer performance of the proposed flow is significantly improved in comparison with the conventional case of the fluid flowing parallel to the channel bed. The presence of the porous layer leads to a more even spread of the fluid on the target surface, which reduces the thermal stresses and prevents the large differences between the highest and lowest values of heat transfer coefficients. They also found that both the porosity and particularly the permeability of the porous layer enhance the effect of the crossflow along the flow associated with the multiple‐impinging jet setup. For a certain thickness of the porous layer, it is possible to reduce the amplitude of the Nusselt number oscillations effectively, while keeping the overall Nusselt number desirably high.

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Investigation of a Confined Laminar Impinging Jet on a Plate with a Porous Layer Using the Preconditioned Density-Based Algorithm

Cited by 8 publications

References 48 publications

Investigations of Heat Transfer Enhancement in a Channel with Staggered Porous Ribs by the Preconditioned Density-Based Algorithm

Investigations of Heat Transfer Enhancement in a Channel with Staggered Porous Ribs by the Preconditioned Density-Based Algorithm

A numerical investigation of heat transfer and entropy generation during jet impingement cooling of protruding heat sources without and with porous medium

Numerical simulation of an impinging jet array in a square channel covered by a porous layer

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