Journal ArticleDOI
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
Citations
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Journal ArticleDOI
Temperature measurement in microfluidic systems using a temperature-dependent fluorescent dye.
TL;DR: The efficacy of the method is demonstrated by measuring temperature distributions resulting from Joule heating in a variety of microfluidic circuits that are electrokinetically pumped.
Journal ArticleDOI
Tracer-LIF diagnostics: quantitative measurement of fuel concentration, temperature and fuel/air ratio in practical combustion systems
Christof Schulz,Volker Sick +1 more
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.
Journal ArticleDOI
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.
Journal ArticleDOI
Dual-Emitting Nanoscale Temperature Sensors
TL;DR: In this article, the authors provide an overview of the key mechanisms underpinning the dual emission of various nanostructures from recent literature and discuss their relationship to optical thermometry.
Journal ArticleDOI
A triarylboron-based fluorescent thermometer: sensitive over a wide temperature range.
TL;DR: The luminescence color was determined by the population of the two distinct excited-state conformations-a local excited state (high temperature) and a twisted intramolecular charge-transfer state (low temperature).
References
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Journal ArticleDOI
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.
Book
Practical fluorescence; theory, methods, and techniques,
George G. Guilbault,J. D. Norris +1 more
Book ChapterDOI
Structure and Properties of Laser Dyes
TL;DR: In this article, the relationship between molecular structure and the lasing properties of organic dyes has been investigated and the physicochemical properties of the most important laser dyes are discussed in some detail.
Journal ArticleDOI
Digital particle image thermometry: The method and implementation
Dana Dabiri,Morteza Gharib +1 more
TL;DR: A computerized flow visualization technique capable of automatically quantifying the temperature field in a two-dimensional cross section of a flow field is described, applied to the study of a heated vortex-ring and some preliminary results are discussed.
Journal ArticleDOI
Measurements of thermally stratified pipe flow using image-processing techniques
TL;DR: In this paper, the cross-correlation technique and laser induced fluorescence (LIF) have been adopted to measure the time-dependent and two-dimensional velocity and temperature fields of a stably thermal-stratified pipe flow.
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