A numerical study of turbulent opposed impinging jets issuing from triangular nozzles with different geometries

Parham, Kiyan; Esmaeilzadeh, E.; Atikol, Uğur; Aldabbagh, L.B.Y.

doi:10.1007/s00231-010-0741-0

Cited by 19 publications

(3 citation statements)

References 38 publications

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“…Comparing with standard k-ε model, the renormalization group (RNG) k-ε model includes additional terms for dissipation rate ε development which can significantly improve the accuracy for rapidly strained flows [22]. Therefore, the RNG k-ε turbulence model is numerically robust and fast, and has been proven to be effective in modeling this type of complex flows in impinging and opposed jets [23,24].…”

Section: Mathematical Modelmentioning

confidence: 99%

Enhanced heat transfer characteristics of conjugated air jet impingement on a finned heat sink

Qiu

Geng

et al. 2017

THERM SCI

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Air jet impingement is one of the effective cooling techniques employed in micro-electronic industry. To enhance the heat transfer performance, a cooling system with air jet impingement on a finned heat sink is evaluated via the computational fluid dynamics method. A 2-D confined slot air impinging jet on a finned flat plate is modeled. The numerical model is validated by comparison of the computed Nusselt number distribution on the impingement target with published experimental results. The flow characteristics and heat transfer performance of jet impingement on both of smooth and finned heat sinks are compared. It is observed that jet impingement over finned target plate improves the cooling performance significantly. A dimensionless heat transfer enhancement factor is introduced to quantify the effect of jet flow Reynolds number on the finned surface. The effect of rectangular fin dimensions on impingement heat transfer rate is discussed in order to optimize the cooling system. Also, the computed flow and thermal fields of the air impingement system are examined to explore the physical mechanisms for heat transfer enhancement.

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Section: Mathematical Modelmentioning

confidence: 99%

Enhanced heat transfer characteristics of conjugated air jet impingement on a finned heat sink

Qiu

Geng

et al. 2017

THERM SCI

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“…The RNG k-ε turbulence model is numerically robust and fast, which has been proven to be effective in modeling this type of complex flows in impinging and opposed jets [10]. Thus, in the current study, RNG k-ε model is used to model the turbulent behavior of the flow.…”

Section: Numerical Simulationmentioning

confidence: 99%

A Numerical Study on the Flow Characteristics of Opposed Impinging Jets

Qiu

Pang

2012

AMR

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Inspired by the increasing interests on mixing effectiveness of opposed impinging jets, a numerical work is carried out to study the flow characteristics. The fluid temperature is used as a passive tracer to evaluate the mixing rate in the current mathematical models. The effect of Reynolds number on the mixing performance is discussed. Furthermore, in order to enhance the mixing efficiency and reduce the energy cost, unsteady flow pulsations are induced at the jet inlets. The numerical results indicate that the mixing efficiency can be improved by the unsteady flow pulsations via adjusting the hydrodynamics characteristics in the opposed jets.

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“…Therefore, the present work was carried out to find out the effects of radiation on the mentioned jets hydrodynamic characteristics. This article is in essence some parts of our ongoing studies [9].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Thermal Radiation Effect on Confined Turbulent Free Triangular Jets

Parham

Esmaeilzadeh

Siahsarani

et al. 2013

Advances in Mechanical Engineering

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The present study investigates the effects of thermal radiation on turbulent free triangular jets. Finite volume method is applied for solving mass, momentum, and energy equations simultaneously. Discrete ordinate method is used to determine radiation transfer equation (RTE). Results are presented in terms of velocity, kinetic energy, and its dissipation rate fields. Results show that thermal radiation speeds the development of velocity on the jet axis and enhances kinetic energy; therefore, when radiation is added to free jet its mixing power, due to extra kinetic energy, increases.

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A numerical study of turbulent opposed impinging jets issuing from triangular nozzles with different geometries

Cited by 19 publications

References 38 publications

Enhanced heat transfer characteristics of conjugated air jet impingement on a finned heat sink

Enhanced heat transfer characteristics of conjugated air jet impingement on a finned heat sink

A Numerical Study on the Flow Characteristics of Opposed Impinging Jets

Numerical Study of Thermal Radiation Effect on Confined Turbulent Free Triangular Jets

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