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Whole Field Measurement of Temperature in Water Using Two-Color Laser Induced Fluorescence
Jun Sakakibara,Ronald J. Adrian +1 more
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In this paper, a technique is described that measures the instantaneous three-dimensional temperature distribution in water using two-color laser-induced fluorescence (LIF) and two fluorescent dyes, Rhodamine B and Rhodamine 110, are used as temperature indicators.Abstract:
A technique is described that measures the instantaneous three-dimensional temperature distribution in water using two-color laser-induced fluorescence (LIF). Two fluorescent dyes, Rhodamine B and Rhodamine 110, are used as temperature indicators. A laser light sheet scanned across the entire measurement volume excites the fluorescent dye, and an optical system involving a color beam splitter gives the intensity distribution of the individual fluorescent dyes on two separate monochrome CCD cameras. The ratio of these fluorescence intensities at each point of the image is calibrated against the temperature to eliminate the effect of the fluctuation of illuminating light intensity. A stable thermally stratified layer was measured by this system to evaluate the total accuracy of the measurement system. The random error of the measurement was ±1.4 K with 95% confidence. Measurements of thermal convection over a heated horizontal surface show temperature iso-surfaces having typical structures such as plumes, ridges and thermals.read more
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References
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Distortion compensation for generalized stereoscopic particle image velocimetry
TL;DR: In this article, a general experimental calibration procedure is described which determines the magnification matrix of a distorted imaging system, and an algorithm is presented to compute accurate velocity field displacements from measurements of distorted PIV images.
Distortion Compensation for Generalized Stereoscopic Particle Image Velocimetry
TL;DR: In this paper, a general experimental calibration procedure is described which determines the magnification matrix of a distorted imaging system, and an algorithm is presented to compute accurate velocity field displacements from measurements of distorted PIV images.
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TL;DR: In this paper, the fundamental concepts for how to devise and apply quantitative measurement techniques for studies of fuel concentration, temperature, and fuel/air ratio in practical combustion systems, with some emphasis on internal combustion engines.
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Miniaturized PCR chips for nucleic acid amplification and analysis: latest advances and future trends
Chunsun Zhang,Da Xing +1 more
TL;DR: Recent research on chip substrates, surface treatments, PCR reaction volume and speed, architecture, approaches to eliminating cross-contamination and control and measurement of temperature and liquid flow is summarized.
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Dual-Emitting Nanoscale Temperature Sensors
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Whole Field Measurement of Temperature in Water using Two-Color Laser Induced Fluorescence
Jun Sakakibara,Ronald J. Adrian +1 more