High order items of turbulent velocity fluctuations in the Kenics static mixer

HuiBo Meng; YanFang Yu; JianHua Wu

doi:10.1117/12.819739

31 December 2008 High order items of turbulent velocity fluctuations in the Kenics static mixer

HuiBo Meng, YanFang Yu, JianHua Wu

Proceedings Volume 7130, Fourth International Symposium on Precision Mechanical Measurements; 71304Z (2008) https://doi.org/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.

Citation Download Citation

HuiBo Meng, YanFang Yu, and 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); https://doi.org/10.1117/12.819739

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