Heat Transfer From a Flat Plate to a Fully Developed Axisymmetric Impinging Jet

Lee, D.; Greif, R.; Lee, S. J.; Lee, J. H.

doi:10.1115/1.2822647

Cited by 52 publications

(17 citation statements)

References 19 publications

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“…The decrease beyond H =D ¼ 8 is due to the lower arrival velocity of the jet. Similar variation of the stagnation point Nusselt number has been reported by Lee et al [12], however Nu max occurs at H =D ¼ 6; the difference between the two studies has been attributed to the different potential core lengths. Ashforth-Frost and Jambunathan [8] have shown that the maximum stagnation point Nusselt number occurs at a distance from the nozzle exit of approximately 110% of the potential core length.…”

Section: Introductionsupporting

confidence: 72%

Jet impingement heat transfer – Part I: Mean and root-mean-square heat transfer and velocity distributions

O’Donovan

Murray

2007

International Journal of Heat and Mass Transfer

196

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Section: Introductionsupporting

confidence: 72%

Jet impingement heat transfer – Part I: Mean and root-mean-square heat transfer and velocity distributions

O’Donovan

Murray

2007

International Journal of Heat and Mass Transfer

196

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“…A digital color image processing system is used to determine the temperature quantitatively corresponding to a particular color of liquid crystal. The measurement technique in this study, described by Lee et al (1995Lee et al ( , 1997, provides a method for determining the surface isotherms using the liquid crystal. Similar to the liquid crystal calibration, the Windows program which utilizes C++ language is developed for the heat transfer measurements.…”

Section: 36mentioning

confidence: 99%

“…Cooper et al (1975) applied the liquid crystal to the convective heat transfer study in the flow over the heated cylinder. Goldstein and Timmers (1982), Baughn and Shimizu(1989), and Lee et al (1994Lee et al ( , 1995Lee et al ( , 1997 used the liquid crystal for the heat transfer measurement with circular impinging jets. Schultz and Jones (1973), and Jones (1977) reviewed the heat transfer studies using thermal paint.…”

Section: Introductionmentioning

confidence: 99%

A new liquid crystal color calibration technique using neural networks and median filtering

Lee

Chung

Won

et al. 2000

KSME International Journal

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This study has developed a new liquid crystal calibration technique using Neural networks with median filtering and applied this technique to heat transfer measurements. To verify the validity of this new measurement technique, the local Nusselt numbers on a flat plate surface subjected to an axisymmetric impinging jet were measured and compared with the results by the conventional Hue-temperature calibration technique under the same conditions. Because the Neural networks predict the non-linear relations between temperatures and corresponding R, G, B values, Neural networks-median filtering calibration technique can utilize a much wider color band in the experiment than the Hue-temperature calibration technique, resulting in a significant reduction in the experimental time.

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“…They used a large eddy simulation technique in the numerical computation and indicated that results compared favorably with the experimental results, particularly in the stagnation zone. The effects of nozzle diameter on heat transfer and fluid flow due to jet impingement on a flat plate were examined by Lee et al [8]. They indicated that the local Nusselt number increased with increasing nozzle diameter in the stagnation region, which might be attributed to an increase in the jet momentum and turbulence intensity level with the large nozzle diameter.…”

Section: Introductionmentioning

confidence: 98%

Jet impingement onto a tapered hole: Influence of jet velocity and hole wall velocities on heat transfer and skin friction

Shuja

Yilbaş

Khan

2008

Numerical Methods in Fluids

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SUMMARYJet impingement onto a hole with elevated wall temperature can be associated with the high-temperature thermal drilling, where the gas jet is used for shielding the hole wall from the high-temperature oxidation reactions as observed in the case of laser drilling. In laser processing, the molten flow from the hole wall occurs; and in the model study, the hole wall velocity resembling the molten flow should be accounted for. In the present study, gas jet impingement onto tapered hole with elevated temperature is considered and the heat transfer rates as well as skin friction at the hole wall surface are predicted. The velocity of molten flow from the hole wall determined from the previous study is adopted in the simulations and the effect of hole wall velocity on the heat transfer rates and skin friction is also examined. It is found that the Nusselt number and skin friction at the hole wall in the regions of hole inlet and exit attain high values. The influence of hole wall velocity on the Nusselt number and skin friction is found not to be very significant.

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Heat Transfer From a Flat Plate to a Fully Developed Axisymmetric Impinging Jet

Cited by 52 publications

References 19 publications

Jet impingement heat transfer – Part I: Mean and root-mean-square heat transfer and velocity distributions

Jet impingement heat transfer – Part I: Mean and root-mean-square heat transfer and velocity distributions

A new liquid crystal color calibration technique using neural networks and median filtering

Jet impingement onto a tapered hole: Influence of jet velocity and hole wall velocities on heat transfer and skin friction

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