By Werner J. A. Dahm, Kenneth B. Southerland, Kenneth A. Buch (auth.), Professor R. J. Adrian, Professor D. F. G. Durão, Professor F. Durst, Professor M. Maeda, Professor J. Whitelaw (eds.)
This quantity involves papers chosen from the court cases of the 5th overseas Symposium on purposes of Laser recommendations to Fluid Mechanics, held on the Calouste Gulbenkian origin in Lisbon from nine to twelve July, 1990. Relative to past conferences within the Lisbon sequence the scope of this symposium used to be broadened by means of increasing the topical assurance to incorporate all laser recommendations utilized in fluid mechanics. this transformation famous the rage among experimental fluid dynamicists to hire laser strategies for the mea surement of many various amounts, together with focus, temperature, particle dimension, and pace, and the necessity for researchers to have a discussion board within which to speak their paintings and proportion their universal pursuits. The 5th Symposium contained twenty-three periods of formal shows and a full of life Open discussion board ses sion. furthermore, Dr. H. J. Pfeiffer equipped a different Workshop at the Use of pcs in stream Mea surements which contained 5 periods on frequency area processors, correIa tors, distinctive detectors, and biasing.
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Extra resources for Applications of Laser Techniques to Fluid Mechanics: 5th International Symposium Lisbon, Portugal, 9-12 July, 1990
BENCH MEASUREMENT Effects of Background Light the simultaneous measurement, of velocity and Before temperature, we investigated the effects of background noise on fluorescence intensity, including those of room light, noise caused by detector and electronic circuit, fluorescence impurities which may exist in water, scattering particles used for velocity measurements, and velocity fluctuations. The effect of the velocity fluctuations was examined since fluorescence in the path of the beam decreases with time if fluorescence dye is used with high laser intensity and without fluid motion[l].
In Figs. 12(c) and 13(c), the v'T' correlation at remarkable and stronger than that obtained at 3 cm. 1 As seen cm is At 3 cm above the heater, the velocity fluctuation is large and the correlation peaks are not obvious and the correlation diagram shows weaker relation between the temperature and the velocity. It is found that the fluorescence method can provide better correlation of temperature and velocity than that obtained by the thermocouple. CONCLUSIONS We have been developing a system for simultaneous measurement of temperature and velocity, using laser induced fluorescence and laser Doppler velocimetry.
CONCLUSIONS PLIP techniques has been used to obtain high dynamic range quantitative concentration measurements in a turbulent jet in both single camera and two-cameras experimental set-ups. Compared to single camera recording, for the same flow region to be imaged, the simultaneous use of two cameras increases both the resolution and dynamic range of the data. Compared to single point measuring techniques PLIP data enables the calculation of multiple-point results including gradients or spatial correlations.
Applications of Laser Techniques to Fluid Mechanics: 5th International Symposium Lisbon, Portugal, 9-12 July, 1990 by Werner J. A. Dahm, Kenneth B. Southerland, Kenneth A. Buch (auth.), Professor R. J. Adrian, Professor D. F. G. Durão, Professor F. Durst, Professor M. Maeda, Professor J. Whitelaw (eds.)