Heat transfer enhancement on a flat surface with axisymmetric detached ribs by normal impingement of circular air jet

Katti, Vadiraj; Prabhu, S.V.

doi:10.1016/j.ijheatfluidflow.2008.05.003

Cited by 64 publications

(20 citation statements)

References 24 publications

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“…Jet impingement on a rib fitted target surface disrupts the wall jet and thus level of turbulence and heat transfer are expected to increase [20]. Katti and Prabhu [21] studied the effect of rib height, width, pitch, clearance of the detached ribs from the flat plate and the location of the first rib from the stagnation point on local heat transfer. They observed continuous Nu augmentation from the stagnation point up to the first detached rib for all the configurations studied, due to an accelerated fluid in the stagnation zone by the clearance of the first rib.…”

Section: Experimental Studies On Impinging Flowsmentioning

confidence: 99%

“…An extremely small number of studies dealing with jet impingement heat transfer on a ribbed surface either experimentally or numerically have been reported. Different kinds of turbulent promoter surfaces and arrangements have been used in the literature for convective heat transfer enhancement [21][22][23][74][75][76][77]. Two arrangements for rib roughened impingement surface are possible, e.g., ribs may be attached with the impingement surface [22,23,74,78] (attached ribs) or these may be detached from the impingement surface with a small spacing between rib and impingement wall [21] (Fig.…”

Section: Computational Domain and Boundary Conditionsmentioning

confidence: 99%

See 1 more Smart Citation

Flow and thermal characteristics of jet impingement: comprehensive review

Shukla¹,

Dewan²

2017

IJHT

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A comprehensive review on jet impingement heat transfer is presented to consider the state-of the art in this field. Among all the single-phase heat transfer arrangements possible, it has the maximum heat transfer rate. A number of arrangements are possible to represent a practical or physical situation, such as, jet impingement on a solid flat surface or surface fitted with different kinds of turbulent promoters, inclined plane surface and cylindrical convex/concave surface, etc. A significant number of papers dealing with experimental and computational studies on different physical and computational aspects of jet impinging flows are reviewed. Several parameters were found to influence the characteristics, such as, flow confinement, nozzle shape, jet to plate spacing and Reynolds number. An extremely small number of studies dealing with application based jet impingement heat transfer configurations (e.g., ribs fitted impingement plate, moving impingement plate, etc) experimentally and numerically have been reported in the literature. Various computational approaches, such as, RANS, LES, DNS and hybrid models, that are used to study the jet impingement heat transfer, with their complexities and boundary conditions, have been reviewed. It was observed that majority of RANS based turbulence models did not predict impinging flows accurately and its complexities except a few. Many authors have reported that LES is capable of predicting the flow field and heat transfer data within the accepted accuracy limits. DNS can be applied to simple geometry with low Reynolds number. Recently some authors have employed hybrid models, such as, PANS, DES, etc., and concluded that these models provide reasonably accurate results and were found to be computationally less expensive than LES and DNS.

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Section: Experimental Studies On Impinging Flowsmentioning

confidence: 99%

Section: Computational Domain and Boundary Conditionsmentioning

confidence: 99%

Flow and thermal characteristics of jet impingement: comprehensive review

Shukla¹,

Dewan²

2017

IJHT

View full text Add to dashboard Cite

show abstract

“…An experimental investigation is carried out to study the heat transfer enhancement from a flat surface with axisymmetric detached rib-rougheners due to normal impingement of circular air jet Katti and Prabhu [23]. They determined that the ratio of average Nusselt numbers of ribbed and smooth surface increases with the Reynolds number.…”

Section: Introductionmentioning

confidence: 99%

Velocity field and turbulence effects on heat transfer characteristics from surfaces with V-shaped ribs

Çalışkan

Baskaya

2012

International Journal of Heat and Mass Transfer

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“…Experimental studies have been reported by several researchers (Gardon and Akfirat, 1965;Gardon and Cobonpue, 1962;Jambunathan et al, 1992;Katti and Prabhu, 2008;Lee et al, 2004;Livingood and Hrycak, 1970;Lytle and Webb, 1994;Martin, 1977;Viskanta, 1993). Mathematical analysis (modeling and simulation studies) has also been being investigated (Lytle and Webb, 1994;Sarkar and Singh, 2003;Shi et al, 2002;Tutar et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…Industries (e.g. food products, pharmaceuticals, textiles, films, papers, computers and electronics) requiring local heat transfer have begun to see the benefits of the mathematical analysis (Dirita et al, 2007;Erdogdu et al, 2005Erdogdu et al, , 2007Katti and Prabhu, 2008).…”

Section: Introductionmentioning

confidence: 99%