Impingement cooling in a rib‐roughened channel with cross‐flow

Jia, Rongguang; Rokni, Masoud; Sundén, Bengt

doi:10.1108/09615530110403598

Cited by 30 publications

(8 citation statements)

References 16 publications

(18 reference statements)

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“…A universally valid model is seemingly impossible, because Reynolds stresses have all scales (largest to smallest) embedded in them, and larger scales depend on the geometry and boundary conditions, which are problem dependent. Nevertheless, the RANS approach has provided meaningful results for a wide range of problems [10][11][12][13][14][15][16][17][18][19][20][21]. Despite its imperfections and shortcomings, RANS has developed into a widely used engineering tool and general-purpose RANS codes are being applied to increasingly complex and varied problems.…”

Section: Rans and Reynolds-stress Modelingmentioning

confidence: 99%

An overview of turbulence modeling

Durbin¹,

Shih²

2005

Modelling and Simulation of Turbulent Heat Transfer

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Despite its great importance and the tremendous efforts that have been made to understand it, turbulence remains a thorny problem. Though great strides have been made and a plethora of predictive turbulence models have been developed, there is only a modicum of guidance available on what is practical and what can be relied upon for design and analysis. This chapter seeks to provide an introduction to turbulence modeling and to make some sense of it. First, the physics of turbulence are described briefly. Then, different mathematical approaches used to predict turbulent flows are outlined, with focus on their essence, their ability to predict correctly, and their turnaround time. Next, widely used, single-point closure models for Reynolds-averaged Navier-Stokes equations are summarized, with some reference to the principles used to develop them. Finally, an appraisal is given of the current state-of-art models, in order to provide guidelines on their usefulness. The chapter concludes with comments on transition prediction. Nomenclature b ij anisotropy tensor C p constant pressure specific heat d shortest distance to the wall k turbulent kinetic energy or thermal conductivity P rate of turbulent kinetic energy production

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Section: Rans and Reynolds-stress Modelingmentioning

confidence: 99%

An overview of turbulence modeling

Durbin¹,

Shih²

2005

Modelling and Simulation of Turbulent Heat Transfer

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show abstract

“…for the maximum heat transfer. Rib-roughened non-flat surfaces (curved surfaces; such as convex, semi-cylindrical or cylindrical) were used by Hsieh et al [5], Yan and Mei [6], Jia et al [7] and Chung et al [8]. It was seen that the heat transfer may increase up to 20e30% for the roughened surfaces, compared to smooth surfaces [5,8].…”

Section: Introductionmentioning

confidence: 97%

Experimental investigation of impinging jet array heat transfer from a surface with V-shaped and convergent-divergent ribs

Çalışkan

Baskaya

2012

International Journal of Thermal Sciences

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“…for the maximum heat transfer. Rib roughened non-flat surfaces were used by Hsieh et al [10], Yan and Mei [11], Jia et al [12] and Chung et al [13]. It was seen that the heat transfer may increase up to 20-30% for the roughened surfaces, compared to smooth surfaces [10,13].…”

Section: Introductionmentioning

confidence: 98%