31 December 2008 High order items of turbulent velocity fluctuations in the Kenics static mixer
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Proceedings Volume 7130, Fourth International Symposium on Precision Mechanical Measurements; 71304Z (2008); doi: 10.1117/12.819739
Event: Fourth International Symposium on Precision Mechanical Measurements, 2008, Anhui, China
Abstract
The turbulent flow characteristic of flowing velocity field in the Kenics static mixer (KSM) was studied by measuring the time series of pulsant velocity with Laser Doppler Anemometer. The probability density functions of the Cartesian velocity fluctuations were obtained and compared with the corresponding normal distributions. The deviation from the normal distribution described by skewness and flatness factors was analyzed quantitatively. The experimental results indicate that the value of Skewness fluctuates from -2.79 to 3.12 which mean that the distribution of velocity field is not a normal distribution, and the existence of coherent structure is pointed out by the distribution of Flatness of pulsant velocity with a range of 3~9.5.
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HuiBo Meng, YanFang Yu, JianHua Wu, "High order items of turbulent velocity fluctuations in the Kenics static mixer", Proc. SPIE 7130, Fourth International Symposium on Precision Mechanical Measurements, 71304Z (31 December 2008); doi: 10.1117/12.819739; https://doi.org/10.1117/12.819739
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KEYWORDS
Statistical analysis

Chemical elements

Laser Doppler velocimetry

Transition metals

3D metrology

Doppler effect

Laser systems engineering

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