Experimental Determination of Radiative Properties for Scattering Particulate

Menart, A.; Lee, H. S.; Buckius, Richard O.

doi:10.1080/08916158908946371

Cited by 10 publications

(10 citation statements)

References 14 publications

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“…A later approach made use of a miniature heat conduction probe shown schematically in figure 29 [87]. The probe area exposed to the arc is less than 1 mm in diameter, i.e.…”

Section: Heat Flux Measurementsmentioning

confidence: 99%

The anode region of electric arcs: a survey

Heberlein¹,

Mentel²,

Pfender³

2009

J. Phys. D: Appl. Phys.

131

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Electric arc anodes frequently determine functional performance and lifetime of a number of arcing devices, ranging from discharge lamps to plasma spray torches. While there have been numerous studies of the anode region of electric arcs, our understanding of the detailed physical processes is still limited. The reason for this lack of detailed knowledge is that numerous factors influence the arc–anode interaction, and that the plasma–solid interface in high intensity arcs is in general not accessible to diagnostics and one has to rely on indirect measurements. Throughout this survey, the emphasis will be on high intensity arc anodes, i.e. on plasmas with temperatures of more than 10 000 K and electron densities exceeding 1022 m−3 outside the boundary layer, and heat fluxes exceeding 107 W m−2. The plasma parameters in the boundary layer as obtained with different techniques by a number of investigators for a variety of conditions are presented, and the effect of macroscopic flow conditions is discussed. Experimental and modelling results are presented. A brief comparison with low current arcs is also given, and the areas that need further research are highlighted.

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“…A later approach made use of a miniature heat conduction probe shown schematically in figure 29 [87]. The probe area exposed to the arc is less than 1 mm in diameter, i.e.…”

Section: Heat Flux Measurementsmentioning

confidence: 99%

The anode region of electric arcs: a survey

Heberlein¹,

Mentel²,

Pfender³

2009

J. Phys. D: Appl. Phys.

131

View full text Add to dashboard Cite

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“…Previous pertinent studies include the experimental characterization of radiative properties of dispersed media [8], the experimental determination of the extinction coefficient of packed beds [9][10][11][12] and liquid suspensions [13], and the development of an experimental system for measuring the scattering albedo, extinction, and scattering coefficients, phase function, and asymmetry factor of particulates in the infrared [14]. The basic approach for the experimental determination of β λ consists in measuring the attenuation of a light beam and solving Eq.…”

mentioning

confidence: 99%

Experimental Determination of the Extinction Coefficient for a Packed-Bed Particulate Medium

Osinga¹,

Lipiński²,

Guillot

et al. 2006

Experimental Heat Transfer

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The extinction coefficient of a powder mixture of ZnO and beech charcoal is determined at ambient temperature using two experimental set-ups: (a) radiation in the range 500-1000 nm is captured by a 200 µm-diameter fiber optic and sent to a spectrometer equipped with a Si/PbSe detector; (b) radiation in the range 350-1100 nm is captured by a 5 mmdiameter Si-photodiode. Both set-ups measure the attenuation of intensity from a 3273 K blackbody source. The experimental results are implemented in the numerical solution of the equation of radiative transfer, using the Monte-Carlo ray-tracing technique. The extinction coefficient is determined to be 10103 ± 615 m −1 at 1000 nm using set up (a), and 7850 ± 337 m −1 for the range 350-1100 nm using the more accurate set-up (b).

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“…The optical thickness is between 0.05 and 1.05, which is not totally below the 0.1 value recommended by van de Hulst (1981). However, Menart et al (1989) point out that the actual optical depth for scattering is usually smaller than that which is based on the overall diameter of the test section.…”

Section: Extinction Coefficientmentioning

confidence: 99%

“…If a reasonable estimate of a particle size parameter and relative refractive index (rn,/nz,), are available, Mie phase function results can be used to improve the extrapolation procedure (Menart et al, 1989). Menart et al (1989) suggested an extrapolation technique taking an average value of the available ratio of experimental data to Mie phase function data [e(0)/PM(6)] in a wide angular region.…”

Section: Phase Functionmentioning

confidence: 99%

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Determination of Radiative Transport Properties of Particle Suspensions by a Single-Scattering Experiment

Chae

Lee

1993

Aerosol Science and Technology

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A light-scattering experiment on particles was performed to determine radiative transport properties of the suspension. Extinction coefficient, scattering coefficient, and phase function are the important properties. A generalized light-scattering experimental setup was designed and constructed to perform systematic research on light scattering by particles. By measuring the transmitted energy and angular scattered-energy distribution around a particle suspension, complete information on radiative transport properties could be obtained. This study focused on the performance of the experimental setup with purely scattering particle suspensions. Transparent polymer monospheres with diameters of 0.091, 0.546, 1.001, and 7.04 Frn were used in separate suspensions of water for this study. The radiative transport properties obtained experimentally are compared with results from Mie theory. The single-scattering condition was examined and maintained during this experiment. The number concentrations of all but the smallest particles were independently measured using an optical liquid-borne particle counter.

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Experimental Determination of Radiative Properties for Scattering Particulate

Cited by 10 publications

References 14 publications

The anode region of electric arcs: a survey

The anode region of electric arcs: a survey

Experimental Determination of the Extinction Coefficient for a Packed-Bed Particulate Medium

Determination of Radiative Transport Properties of Particle Suspensions by a Single-Scattering Experiment

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