Numerical Simulation of Turbulent Fluid Flow and Heat Transfer Characteristics in a Rectangular Porous Channel with Periodically Spaced Heated Blocks

Yang, Yue-Tzu; Hwang, Ming-Lu

doi:10.1080/10407780802424387

Cited by 17 publications

(2 citation statements)

References 33 publications

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“…The approach proposed by Pedras and de Lemos [13][14][15][16] was considered to model the turbulent flow in the open pores of the filter. The volume-averaged conservative forms of the transport equations for turbulent flow in Cartesian-tensor notation for the porous layer in terms of the superficial (Darcian) velocity are as follows [17][18][19][20]:…”

Section: Model Assumptionsmentioning

confidence: 99%

A Numerical Study of 3D Turbulent Melt Flow and Solidification in a Direct Chill Slab Caster with a Porous Combo Bag Melt Distributor

Begum

Hasan

2014

Numerical Heat Transfer, Part A: Applications

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A 3D turbulent melt flow and solidification of an aluminum alloy (AA-1050) for an industrial-sized direct chill slab casting process is modeled. The melt is delivered through a rectangular submerged nozzle and a non-deformable combo bag fitted with a bottom porous filter. The non-Darcian model, incorporating the Brinkman and Forchheimer extensions, is used to characterize the turbulent melt flow behavior passing through the porous filter. The casting speed and the effective heat transfer coefficient at the metal-mold contact region within the mold are varied. The above two parameters are found to have significant influence on the solidification process.

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Section: Model Assumptionsmentioning

confidence: 99%

A Numerical Study of 3D Turbulent Melt Flow and Solidification in a Direct Chill Slab Caster with a Porous Combo Bag Melt Distributor

Begum

Hasan

2014

Numerical Heat Transfer, Part A: Applications

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“…One of the areas in which turbulence in porous media plays an important role is in partially filled pipes incorporated in heat exchangers owing to the high velocity of heat transfer fluid in such applications. Thus many researchers, such as Kuznetsov [15] and Yang and Hwang [16], have numerically investigated the effects of turbulence on the Nusselt number in a pipe partially filled with a permeable media. It is found that including turbulence effects results in flatter velocity and temperature profiles and rectifies the under-prediction of Nusselt number in the laminar model.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of different heat transfer enhancement mechanisms in a partially porous pipe

2021

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The effect of porous material position on the heat transfer inside a pipe working in a turbulent regime is studied here to obtain a detailed understanding of the heat transfer enchantment mechanisms in different porous substrate positions. To this end, an in-house Fortran code is developed to solve the governing equations using the finite volume method and SIMPLE algorithm. Turbulent flow in porous media is modeled using a modified version of k–ε model. The flow field and heat transfer inside the partially filled pipe are investigated for the two cases of central and boundary configurations. The porous and flow characteristics including Reynolds number, Darcy number, the conductivity ratios of solid to fluid and the thickness of inserted porous layer are varied and the heat transfer performance is studied in different cases. It is observed that two entirely different phenomena enhance the heat transfer in central and boundary configurations. While the channeling of fluid between the porous media and the pipe wall highly affects the heat transfer performance in the former, the thermal conductivity of porous media plays a highly critical role in the latter configuration. It is shown that, for the same filling ratio, inserting the porous layer at the core of the pipe is more effective than placing it at the wall. Investigating porous materials with different solid conductivities revealed that covering the pipe wall with a porous material is justified only for solid matrixes with high thermal conductivities.

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Forced Convection

Nield¹,

Bejan²

2017

Convection in Porous Media

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Numerical Simulation of Turbulent Fluid Flow and Heat Transfer Characteristics in a Rectangular Porous Channel with Periodically Spaced Heated Blocks

Cited by 17 publications

References 33 publications

A Numerical Study of 3D Turbulent Melt Flow and Solidification in a Direct Chill Slab Caster with a Porous Combo Bag Melt Distributor

A Numerical Study of 3D Turbulent Melt Flow and Solidification in a Direct Chill Slab Caster with a Porous Combo Bag Melt Distributor

A comparative study of different heat transfer enhancement mechanisms in a partially porous pipe

Forced Convection

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