Heat transfer enhancement of backward-facing step flow in a channel by using baffle installation on the channel wall

Tsay, Yeong-Ley; Chang, Tsai-Shou; Cheng, Jen-Chieh

doi:10.1007/s00707-004-0147-5

Cited by 55 publications

(26 citation statements)

References 11 publications

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“…Methods of the PHE have been extensively explored with the attempts to overcome the thermal problems subject to high heat flux [4]. A variety of surface ribs [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21], perforated baffle [22][23][24][25][26][27], pin-fins [28][29][30][31][32], Snail, propeller, twisted and winglet-type vortex generators [33,34,30,[35][36][37][38][39][40][41][42][43][44][45][46] have been devised to enhance heat transfer rates in ducts. However, it is shown in the literature review that detail exploration of turned flow in the channel needs more extensive study.…”

Section: Introductionmentioning

confidence: 99%

The effect of different inlet conditions of air in a rectangular channel on convection heat transfer: Turbulence flow

Kurtbaş

2008

Experimental Thermal and Fluid Science

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Section: Introductionmentioning

confidence: 99%

The effect of different inlet conditions of air in a rectangular channel on convection heat transfer: Turbulence flow

Kurtbaş

2008

Experimental Thermal and Fluid Science

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“…Comparisons with the results of other investigators [2,[13][14][15][16][17][18][19] are presented in Figs. 2 and 3.…”

mentioning

confidence: 73%

On the solution of fluid flow and heat transfer problem in a 2D channel with backward-facing step

Alexander

Liubov

2017

Vestn. Samar. Gos. Tekhn. Univ., Ser. Fiz.-Mat. Nauki

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Use of the all-Russian mathematical portal Math-Net.Ru implies that you have read and agreed to these terms of use http://www.mathnet.ru/eng/agreement Download details: IP: 52.36.4.81 May 12, 2018, 09:52:56 Vestn. Samar. Gos. Tekhn. Univ., Ser. Fiz.-Mat. Nauki [J. Samara State Tech. Univ., Ser. Phys. Math. Sci.], 2017, vol. 21, no. 2, pp. 362-375 ISSN: 2310-7081 (online), 1991 http://doi. AbstractThe stable stationary solutions of the test problem of hydrodynamics and heat transfer in a plane channel with the backward-facing step have been considered in the work for extremely high Reynolds numbers and expansion ratio of the stream ER. The problem has been solved by numerical integration of the 2D Navier-Stokes equations in 'velocity-pressure' formulation and the heat equation in the range of Reynolds number 500Re 3000 and expansion ratio Introduction. Permanent improvement of numerical techniques for modeling fluid dynamics and heat transfer requires adequate methods to assess their effectiveness. For these purposes, consideration of well-known test problems which solutions have all main features of real fluid flows is the best approach. On the one hand, for these problems the huge volume of experimental and theoretical results is saved up that provides their maximum reliability. On the other hand the critical parameters are unambiguously determined for them. The 'intensification' of these parameters increases the complexity of the problems. The efficiency evaluation of a new computing technology follows from this: the more critical parameters of the problem are 'intense', the more the technology is effective. The well-known example of such problem of hydrodynamics of incompressible viscous liquids is the classical lid-driven cavity problem. Reynolds number is the critical parameter for this problem.The problem of separated flow in a 2D channel with backward-facing step is one more such a problem [1]. The problem is characterized by a simple geometry. Its solution, in general, depends on two parameters: Reynolds number Re and expansion ratio ER, where ER is defined as the ratio of the full height of the channel to the height of its inlet segment. Prandtl number Pr is added when heat transfer is taken into account. Change of these few input parameters allows to receive radically various solutions of the problem-namely, separated flow patterns, which are characterized by the quantity, form, size, and position of the vortices. Furthermore, they can have a very complex structure. The maximum value of Reynolds number (Re = 3000 at ER = 2) was reached in the article [2], and expansion ratio (ER = 4 at Re 300) was reached in the works [3,4].Further increase in these parameters causes computational instability which, in particular, is discussed in [2]. E. Erturk recommends to reduce a mesh step for overcoming this instability (see, for example, [5]). But in this case, the systems of the linear algebraic equations (SLAE) with huge number of unknowns are generated, and more effective methods are needed to solve the...

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“…They showed that the flow is characterized by strong deformations and large recirculation regions. The heat transfer enhancements of backwardfacing step flow in a two-dimensional channel through the installation of solid and slotted baffles onto the channel wall have been numerically explored by Tsay et al [5]. This work was particularly focused on the effects of the inclination of baffle installation, height of slot in the baffle, and inclination of slot in the baffle on the flow structure, temperature distribution and Nusselt number variation for the system at various Reynolds numbers.…”

Section: Introductionmentioning

confidence: 99%

The effect of the inclined perforated baffle on heat transfer and flow patterns in the channel

Ary

Lee

Ahn

et al. 2012

International Communications in Heat and Mass Transfer

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Heat transfer enhancement of backward-facing step flow in a channel by using baffle installation on the channel wall

Cited by 55 publications

References 11 publications

The effect of different inlet conditions of air in a rectangular channel on convection heat transfer: Turbulence flow

The effect of different inlet conditions of air in a rectangular channel on convection heat transfer: Turbulence flow

On the solution of fluid flow and heat transfer problem in a 2D channel with backward-facing step

The effect of the inclined perforated baffle on heat transfer and flow patterns in the channel

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