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 contains papers chosen from the complaints of the 5th foreign Symposium on functions of Laser ideas to Fluid Mechanics, held on the Calouste Gulbenkian origin in Lisbon from nine to twelve July, 1990. Relative to earlier conferences within the Lisbon sequence the scope of this symposium used to be broadened through increasing the topical insurance to incorporate all laser suggestions utilized in fluid mechanics. this variation well-known the rage among experimental fluid dynamicists to hire laser innovations for the mea surement of many various amounts, together with focus, temperature, particle measurement, and speed, and the necessity for researchers to have a discussion board during which to speak their paintings and percentage their universal pursuits. The 5th Symposium contained twenty-three periods of formal displays and a full of life Open discussion board ses sion. furthermore, Dr. H. J. Pfeiffer prepared a distinct Workshop at the Use of pcs in circulate Mea surements which contained 5 periods on frequency area processors, correIa tors, certain detectors, and biasing.
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Additional info for Applications of Laser Techniques to Fluid Mechanics: 5th International Symposium Lisbon, Portugal, 9-12 July, 1990
3, heater the and the was placed 20 mm above the bottom of one compartment divided the test section, and cooler was near the water surface in the other compartment. This configuration was useful enhanced global natural and maintained steady temperature field. convection The simultaneous measurement system is shown in Fig. 4. Two beams of an argon-ion LDV were incident in the normal direction to the axis of the electric heater in order to reduce fluctuations of the measurement volume or disappearance of the intersecting point caused by refractive index change of the fluid due to turbulent natural convection or thermal plume.
The beam intensity was determined to be so small that no saturation might occur. 39 g/m 3 . Simultaneous Measurement of Temperature and Velocity The velocity measurements used Mie scattered light from SiC particles, while the temperature was estimated from fluorescence of Rhodamine thermocouple. B or electromotive force Photograph 2 shows of orange the chromel-alumel liquid for the fluorescence and green particles for Mie scattering, where large polystyrene particles -100 pm in diameter) were used to exaggerate the Mie scattering effect.
4) The correlations of temperature and velocity measured by the fluorescence describe strong relation than those measured by the thermocouple, the correlation relation. and where this fluorescence technique the thermocouple can can hardly detect detect the Authors would like to thank Mr. Toshihiro Yamamoto, University for his assistance in the experiment. A. E:Sci. Instrum. g. , Yoshida Z. and Tabata T. Theory, Measurement and Application Japanese. Fluorescence: 1958 Tokyo: Theory, Fluorescence: Nankoudou in Simultaneous, Real-Time Line Measurements of Concentration and Velocity in Turbulent Flows K.