Velocity and turbulence characteristics of a semiconfined orthogonally impinging slot jet

Ashforth-Frost, S.; Jambunathan, K.; Whitney, C.F.

doi:10.1016/s0894-1777(96)00112-4

Cited by 125 publications

(80 citation statements)

References 5 publications

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“…A free jet region may not be present if the nozzle exit lies at a distance of two diameters or slot widths from the target plate [3]. Schlichting [4] showed that the jet half width (a distance where U = Um/2 down the jet axis) and reduction in the center line velocity are directly related to the axial distance after the termination of the potential core.…”

Section: Figure 1 Different Regions Of a Jet Impingement Flowmentioning

confidence: 99%

“…The effect of these parameters on flow field and heat transfer characteristics of slot jet impingement has found special attention in the literature both experimentally and computationally [3,[5][6][7].…”

Section: Experimental Studies On Impinging Flowsmentioning

confidence: 99%

“…Baines and Keffer [10] observed the shear stress to be minimum at the stagnation point with a local maxima in nearby regions. The effect of small nozzle to plate spacing on Nust and Nu was investigated by many researchers, such as, Hoogendoorn [5], Lytle and Webb [11], and Ashforth-Frost et al [3].…”

Section: Experimental Studies On Impinging Flowsmentioning

confidence: 99%

“…Ashforth-Frost et al [3] experimentally investigated velocity and turbulence characteristics of a semi-confined impinging slot jet. They considered H/B of 4 and 9.2 with Re = 20000 and showed that the length of the potential core was longer with the semi-confined arrangement than with the unconfined arrangement due to narrow entrainment and scattering of jets.…”

Section: Experimental Studies On Impinging Flowsmentioning

confidence: 99%

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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: Figure 1 Different Regions Of a Jet Impingement Flowmentioning

confidence: 99%

Section: Experimental Studies On Impinging Flowsmentioning

confidence: 99%

Section: Experimental Studies On Impinging Flowsmentioning

confidence: 99%

Section: Experimental Studies On Impinging Flowsmentioning

confidence: 99%

See 2 more Smart Citations

Flow and thermal characteristics of jet impingement: comprehensive review

Shukla¹,

Dewan²

2017

IJHT

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show abstract

“…More recent measurements have been made by Ichimiya and Hosaka (1992), Ashforth-Frost et al (1997), and Lin et al (1997). Numerical investigations have been carried out by Seyedein et al (1995), Chen and Modi (1999), etc.…”

Section: Introductionmentioning

confidence: 99%