Whole field measurement of temperature in water using two-color laser induced fluorescence

Sakakibara, Jun; Adrian, Ronald J.

doi:10.1007/s003480050260

Cited by 309 publications

(210 citation statements)

References 8 publications

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“…Other techniques are based on the laser-induced fluorescence of a tracer dissolved in the liquid to be sprayed as the use of an exciplex (Murray and Melton 1985;Gossage and Melton 1987) or the use of two fluorescent tracers (Sakakibara et al 1997;Adrian 1999 andKim et al 2003).…”

Section: Introductionmentioning

confidence: 99%

New insight into two-color LIF thermometry applied to temperature measurements of droplets

et al. 2010

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To cite this version:Alexandre Labergue, Valérie Deprédurand, Alain Delconte, Guillaume Castanet, Fabrice Lemoine. New insight into two-color LIF thermometry applied to temperature measurements of droplets. Experiments in Fluids, Springer Verlag (Germany), 2010, 49 (2), pp.547 -556. <10.1007/s00348-010-0828-x>. New insight into two-color LIF thermometry applied to temperature measurements of dropletsAbstract When laser-induced fluorescence of droplets is used for measurements such as droplet temperature, a new dependence of the droplet size on the spectral distribution of fluorescence has been highlighted. The two-color laserinduced fluorescence technique applied to droplet temperature measurement requires a single fluorescent tracer and two spectral bands of detection for which the temperature sensitivity is different. Generally, the ratio of the intensities measured on each of the spectral bands of detection is assumed to be only temperature dependent. However, droplet dependence on diameter is also likely to influence the intensities ratio. This study provides some illustrations of the phenomenon, first on sprays with different mean statistical diameters and secondly on single droplets, for two temperature-sensitive fluorescent tracers in their solvents: sulforhodamine B dissolved in water and pyrromethene 597-8C9 dissolved in n-decane.

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Section: Introductionmentioning

confidence: 99%

New insight into two-color LIF thermometry applied to temperature measurements of droplets

et al. 2010

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“…A fluorescent dye molecule is exposed to an electromagnetic field and photons entering the molecule cause displacements of electrons from one region to another. This displacement of electrons causes an increase in potential energy of the molecule from the ground state to the first electronic excited state resulting in fluorescent light emission [8]. The ratio of the total energy emitted per quantum of energy absorbed by the molecule is called the quantum efficiency Φ.…”

Section: Principlementioning

confidence: 99%

“…The ratio of the total energy emitted per quantum of energy absorbed by the molecule is called the quantum efficiency Φ. The fluorescence energy I [W·m -3 ] emitted per unit volume is defined as [8]: In most organic dyes quantum efficiency is temperature dependent. And although the change in fluorescence intensity is normally small, there are some types of dyes that have significant sensitivity to temperature.…”

Section: Principlementioning

confidence: 99%

“…An obvious disadvantage of those techniques is the possibility that the probes can affect the fluid flow, changing its structure. To avoid this, thermo-chromic liquid crystals have been used to non-intrusively measure full flow field [8]. The color of white light scattered from the thermo-chromic particles can be calibrated against temperature and scattering angle.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of natural convection in cubical enclosure using laser induced fluorescence

2014

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Temperature measurements are extremely important and they are used in many technical and engineering processes, including the analysis of natural convection. In contrast to the commonly used thermocouples and Pt100 temperature sensors, which allow point temperature measurements, laser induced fluorescence technique (LIF) allows the imaging of temperature fields throughout the area. An obvious disadvantage of thermocouples and Pt100 sensors is the possibility that the probes can affect the fluid flow, changing its structure. This problem does not appear in LIF measurements and better accuracy of temperature mapping is obtained. This work focuses on describing one-color LIF technique (using one fluorescent dye) in theoretical and practical terms. The experimental set-up is described, as well as a number of operations required to get the temperature field of the whole domain. The results of the natural convection process analysis in the configuration of one side wall heated and the opposite one cooled, with the use of laser induced fluorescence technique are presented.

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“…In order to overcome this problem, intensity ratio based LIF techniques have been proposed recently, which include the two-dye LIF technique (Coppeta andRoger, 1998 andAdrian, 1999) and the two-emission-band LIF technique (Lavieille et al, 2001). In the two-dye LIF technique, two fluorescent dyes, one temperature-sensitive and the other temperature-insensitive, are used.…”

Section: Introductionmentioning

confidence: 99%

A novel technique for quantitative temperature mapping in liquid by measuring the lifetime of laser induced phosphorescence

Koochesfahani

2003

J Vis

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A unique method is described in the present paper for quantitative mapping of temperature field in a liquid flow by taking advantage of the phosphorescence lifetime dependence on temperature. This methodology represents an extension of Molecular Tagging Velocimetry (MTV) technique. As in MTV measurements, the phosphorescence signal is imaged at two successive times within the lifetime of the tracer. The phosphorescence lifetime, estimated from the intensity ratio of the two images at each point, is calibrated against the temperature. This procedure eliminates the effects of the variation of the incident illumination. The unique method described in the present paper also allows the simultaneous qualification of velocity and temperature fields in a fluid flow by using the same phosphorescent dye (1-BrNp⋅Gβ-CD⋅ROH) and same optical and equipment setup. While the displacements of the tagged regions between two interrogations provide the estimate of fluid velocity vectors, the intensity ratio of the two images represents the fluid temperature distribution. The implementation and application of the new technique are demonstrated by conducting simultaneous temperature and velocity measurements in a pulsed cold jet discharging into hot ambient fluid.

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Whole field measurement of temperature in water using two-color laser induced fluorescence

Cited by 309 publications

References 8 publications

New insight into two-color LIF thermometry applied to temperature measurements of droplets

New insight into two-color LIF thermometry applied to temperature measurements of droplets

Investigation of natural convection in cubical enclosure using laser induced fluorescence

A novel technique for quantitative temperature mapping in liquid by measuring the lifetime of laser induced phosphorescence

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