Search Results - "Grehan, Gérard"

Interferometric out-of-focus imaging of freezing droplets by Brunel, Marc, Talbi, Mohamed, Coetmellec, Sébastien, Grehan, Gérard, Wu, Yingchun, Jacquot-Kielar, Justin

“…Interferometric out-of-focus images of freezing droplets are presented, and compared to simultaneous in-focus images. In these experiments, the freezing…”
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Simultaneous interferometric in-focus and out-of-focus imaging of ice crystals by Kielar, Justin Jacquot, Lemaitre, Pascal, Gobin, Carole, Yingchun, Wu, Porcheron, Emmanuel, Coetmellec, Sébastien, Grehan, Gérard, Brunel, Marc

“…Using a freezing column, dendrite-like ice crystals are generated and characterized simultaneously using in-focus imaging and interferometric out-of-focus…”
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Processing of individual rainbow signals by Saengkaew, Sawitree, Charinpanikul, Tawatchai, Laurent, Claire, Biscos, Yves, Lavergne, Gérard, Gouesbet, Gérard, Gréhan, Gérard

“…The characterization of droplets under evaporation is still a challenge, especially to evaluate the droplet temperature. A promising technique is rainbow…”
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Numerical study of global rainbow technique: sensitivity to non-sphericity of droplets by Wang, Jiajie, Gréhan, Gérard, Han, Yiping, Saengkaew, Sawitree, Gouesbet, Gérard

“…The measurement of droplet temperature and size distribution in sprays is a difficult task. To reach this aim, the global rainbow technique (GRT) has been…”
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Phase interferometric particle imaging for simultaneous measurements of evaporating micron-sized droplet and nanoscale size changes by Wu, Yingchun, Li, Haipeng, Brunel, Marc, Chen, Jia, Gréhan, Gérard, Mädler, Lutz

“…We have developed phase interferometric particle imaging (PHIPI) of Mie scattering to simultaneously measure the spherical and transparent droplet size at the…”
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3D imaging of individual burning char and volatile plume in a pulverized coal flame with digital inline holography by Wu, Yingchun, Yao, Longchao, Wu, Xuecheng, Chen, Jia, Gréhan, Gérard, Cen, Kefa

“…Typical hologram (left) and reconstructed image (right) of burning coal particle and its volatile flame [Display omitted] The burning behaviors of an…”
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Dual-beam interferometric particle imaging for size and shape characterization of irregular coal micro-particle: Validation with digital inline holography by Wu, Xuecheng, Shi, Lin, Lin, Zhiming, Wu, Yingchun, Brunel, Marc, Jacquot, Justin, Gréhan, Gérard

“…•Dual-beam interferometric particle imaging (DIPI) is applied to irregular particle.•Digital inline holography (DIH) and DIPI signals separate in channels of…”
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Experimental study of local flame structures and fuel droplet properties of a spray jet flame by Verdier, Antoine, Marrero Santiago, Javier, Vandel, Alexis, Saengkaew, Sawitree, Cabot, Gilles, Grehan, Gerard, Renou, Bruno

“…An n-heptane spray jet flame is characterised through quantitative measurements using laser-based techniques. The experimental set-up is composed of an annular…”
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Beyond Fresnel’s approximation: Luneburg’s kernel to simulate the interferometric images of droplets or irregular rough particles by Brunel, Marc, Porcheron, Emmanuel, Lemaitre, Pascal, van Beeck, Jeroen, Vetrano, Rosaria, Gréhan, Gérard, Coëtmellec, Sébastien

“…Interferometric particle imaging is generally interpreted in the framework of Fresnel conditions. We develop here a new formalism based on Luneburg’s kernel…”
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Simultaneous measurement of monocomponent droplet temperature/refractive index, size and evaporation rate with phase rainbow refractometry by Wu, Yingchun, Crua, Cyril, Li, Haipeng, Saengkaew, Sawitree, Mädler, Lutz, Wu, Xuecheng, Gréhan, Gérard

“…•Phase rainbow refractometry (PRR) is developed to measure droplet temperature, size and evaporation rate.•Quantitative relationship between ripple phase shift…”
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Change of evaporation rate of single monocomponent droplet with temperature using time-resolved phase rainbow refractometry by Wu, Yingchun, Li, Haipeng, Wu, Xuecheng, Gréhan, Gérard, Mädler, Lutz, Crua, Cyril

“…Droplet evaporation characterization, although of great significance, is still challenging. The recently developed phase rainbow refractometry (PRR) is…”
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One-dimensional rainbow technique using Fourier domain filtering by Wu, Yingchun, Promvongsa, Jantarat, Wu, Xuecheng, Cen, Kefa, Grehan, Gerard, Saengkaew, Sawitree

“…Rainbow refractometry can measure the refractive index and the size of a droplet simultaneously. The refractive index measurement is extracted from the…”
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Soot particle sizing based on analytical formula derived from laser-induced incandescence decay signals by Wu, Jian, Chen, Linghong, Yan, Mingming, Wu, Xuecheng, Gréhan, Gérard, Cen, Kefa

“…The laser-induced incandescence (LII) signal during a heat-conduction-dominated cooling process was used to derive an analytical formula to describe the…”
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Optical characterization of ethane droplets in the vicinity of critical pressure by Kanjanasakul, Chanisa, Grisch, Frédéric, Saengkaew, Sawitree, Gréhan, Gérard

“…The characterization of the properties of fuel droplets around the critical pressure is an experimental challenge. The aim of this study is to measure the size…”
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3D boundary line measurement of irregular particle with digital holography by Wu, Yingchun, Wu, Xuecheng, Yao, Longchao, Brunel, Marc, Coëtmellec, Sébastien, Lebrun, Denis, Gréhan, Gérard, Cen, Kefa

“…The morphology of an irregular particle plays a key role in its interactions with the surroundings, and the 3D characterization of an irregular particle is of…”
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Determination of soot particle size using time-gated laser-induced incandescence images by Chen, Linghong, Wu, Jian, Yan, Mingming, Wu, Xuecheng, Gréhan, Gérard, Cen, Kefa

“…A laser-induced incandescence (LII) image-processing method has been developed to determine two-dimensional polydisperse size distribution of soot particles as…”
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A 3D numerical simulation of laser-induced incandescence of soot particles in coal combustion products by Chen, Ling-hong, Cen, Ke-fa, Garo, Annie, Grehan, Gérard

“…Laser-induced incandescence （LII） has received increasing attention as a potentially powerful technique for in-situ measuring of the volume fraction and…”
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Mixing ratio measurement in multiple sprays with global rainbow refractometry by Wu, Yingchun, Li, Can, Cao, Jianzheng, Wu, Xuecheng, Saengkaew, Sawitree, Chen, Linghong, Gréhan, Gérard, Cen, Kefa

“…[Display omitted] •Global rainbow refractometry measures volume mixing ratios of multiple sprays.•An algorithm is proposed to inverse size distributions and…”
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Simultaneous amplitude and phase contrast imaging of burning fuel particle and flame with digital inline holography: Model and verification by Wu, Yingchun, Brunel, Marc, Li, Renxian, Lan, Lijuan, Ao, Wen, Chen, Jia, Wu, Xuecheng, Gréhan, Gérard

“…•Digital inline holography is applied to measure burning fuel particle with flame.•Three models on holography of burning fuel particle are developed.•Formation…”
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Self-calibrated global rainbow refractometry：a dual-wavelength approach by 吴学成 姜淏予 操凯霖 吴迎春 李灿 Gérard Gréhan Sawitree Saengkaew 岑可法

“…Calibration of the relationship between the scattering angle and the CCD pixel is a key part of achieving accurate measurements of rainbow refractometry.A…”
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