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仪器网/ 行业应用/ 解决方案/ 瑞利-贝纳尔对流池的PIV/PLIF组合测量

瑞利-贝纳尔对流池的PIV/PLIF组合测量

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The present study discusses a test case for the application of digital Particle Image Velocimetry
(PIV) and planar Laser Induced Fluorescence (LIF) as a combined technique.
In this measurement, a water filled Rayleigh-Bénard cell with a fluorescent dye (Rhodamine B) for LIF and
tracer particles for PIV was used. Rhodamine B fluorescence is sensitive to the temperature of the fluid.
Lensing effects, due to local variations in the refractive index of the fluid, were solved by means of a spectral
filter applied to the LIF images. Two cameras, with appropriate optical filters to separate PIV and LIF
signals, were used to simultaneously grab images of the scattering particles and of the dye fluorescence.
After separate processing for the velocity and for the temperature calculation, these fields are recombined to
evaluate the turbulent heat flux. 德国LaVision PIV/PLIF粒子成像测速场仪 Imager sCMOS PIV相机 PLIF平面激光诱导荧光火焰燃烧检测系统
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