Turbulent flow in a channel with transverse rib heat transfer augmentation

Chang, Byong Hoon; Mills, A. F.

doi:10.1016/s0017-9310(05)80056-0

Cited by 21 publications

(5 citation statements)

References 18 publications

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“…The former models have been used by Chang and Mills [23], Arman and Rabas [24], Fusegi [25], lacovides and Raisee [26] and Abdon and Sunden [27]. Low Reynolds number turbulence models or so-called two-layer models are needed to resolve the flow and temperature fields close to the ribs and in between the ribs.…”

Section: Numerical Investigationsmentioning

confidence: 99%

Heat Transfer and Fluid Flow in Rib-Roughened Rectangular Ducts

Sundén¹

1999

Heat Transfer Enhancement of Heat Exchangers

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Section: Numerical Investigationsmentioning

confidence: 99%

Heat Transfer and Fluid Flow in Rib-Roughened Rectangular Ducts

Sundén¹

1999

Heat Transfer Enhancement of Heat Exchangers

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“…Taher et al [17], have studied the impact of the spacing between the baffles on the performance, the results indicated that the heat transfer and pressure drop decreased with the increasing gap between the baffles. Chang and Mills [18] studied numerically a turbulent flow in a channel with segmental baffles, they found that the friction factor is affected by the variation of the height the baffle. A comparative study between solid and porous baffles in a channel shows that the case of porous baffles is better compared to the case of solid baffles [19].…”

Section: Introductionmentioning

confidence: 99%

Computational Analysis of Turbulent Flow and Thermal Transfer in a Shell and Tube Heat Exchanger

Youcef¹,

Saïm²

2019

IJHT

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In order to gain an understanding of the mechanism for increasing thermal performance in the shell side, two models of shell and tube heat exchangers are proposed in this study. Numerical investigations of the shell side fluid flow and heat transfer are performed using CFD FLUENT commercial software based on the k-ε model, the conservation equations of mass, momentum and energy are solved by the finite volume method. The results show that the fluid is completely affected by the baffles. The heat transfer coefficient and the pressure drop varies significantly in the case of the presence of the baffle as an increase from 1.86% and 21.67% successively, the total heat transfer rate increase by 1.11%. The velocity increases by 12% in the case without baffles and by 19% in the case with baffles.

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“…In particular, Manglik and Bergles [4] identified 13 such techniques that can be divided into the two main categories of active techniques, which require an external power supply, and passive techniques, which do not. Passive heat transfer enhancement technologies have been extensively studied in the past [5][6][7] as well as in recent years [8,9]. The first practical enhancements of heat transfer were developed over 50 years ago [10].…”

Section: Introductionmentioning

confidence: 99%

Experimental study of soot particle fouling on ribbed plates: Applicability of the critical local wall shear stress criterion

Paz

Suárez

Concheiro

et al. 2013

Experimental Thermal and Fluid Science

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This article examines the notion of critical wall shear stress as the key control parameter of the local fouling removal process. In this study, an experimental setup was developed for measuring fouling on enhanced surfaces. Specifically, the experimental configuration consists of a forced convection plate heat exchanger containing a one-pass rectangular channel with two ribbed plates arranged in a symmetrically staggered manner. The exhaust gases flow by the rib-roughened sides of the plates, and the flat sides can be cooled with water from the independent external coolant circuit.As a result of soot particle deposition from exhaust gases, a layer of fouling is deposited over the ribs.After asymptotic conditions were reached during the tests, detailed fouling thickness measurements were conducted. The dimensionless particle relaxation time during these tests was determined to be in the range of 0.3-10. The measurements were then complemented with a numerical analysis. In particular, the local wall shear stress was calculated using a commercial computational fluid dynamics (CFD) software package.The fouling thickness profiles deposited over the ribs and the local critical shear stress values were compared and discussed for two different geometries. The results obtained clearly support the idea that critical wall shear stress is an appropriate criterion for facilitating the understanding of the local behaviour of fouling deposits.

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Turbulent flow in a channel with transverse rib heat transfer augmentation

Cited by 21 publications

References 18 publications

Heat Transfer and Fluid Flow in Rib-Roughened Rectangular Ducts

Heat Transfer and Fluid Flow in Rib-Roughened Rectangular Ducts

Computational Analysis of Turbulent Flow and Thermal Transfer in a Shell and Tube Heat Exchanger

Experimental study of soot particle fouling on ribbed plates: Applicability of the critical local wall shear stress criterion

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