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Turbulent properties in a mixed statistically stationary flow

  • 투고 : 2013.11.11
  • 심사 : 2013.11.18
  • 발행 : 2013.11.30

초록

The turbulent properties in a mixed statistically stationary flow were investigated experimentally by a pseudo stereoscopic PIV. In order to validate the experimental results, the profiles of the turbulent kinetic energy were evaluated with the flow features. A mechanical agitator having 6 blades was installed at the bottom of the mixing tank (D=60cm, H=60cm). The agitator was rotated with 80rpm clockwise and counter-clockwise. For the measurements, three cameras were used and all were synchronized. The images captured by one of the three cameras was used for the measurement of rotational speed, and the images captured by the other two cameras were used to measure three dimensional components of velocity vectors. All vectors captured at the same rotational angle were phase averaged to construct three-dimensional vector fields to reconstruct the spatial distribution of the flow properties. It was seen that the jet scrolling along the tank was the main source of mixing.

키워드

참고문헌

  1. D. H. Doh, D. H. Kim, K. R. Cho, Y. B. Cho, T. Saga, and T. Kobayashi, "Development of genetic algorithm based 3D-PTV technique," Journal of Visualization, vol. 5, no. 3, pp. 243-254, 2002. https://doi.org/10.1007/BF03182332
  2. F. Pereira, H. Stuer, EC. Graff, and M. Gharib,, "Two-frame 3D particle tracking," Measurement Science and Technology, vol. 17, no. 7, pp. 1680-1692, 2006. https://doi.org/10.1088/0957-0233/17/7/006
  3. S. M. Soloff, R. J. Adrian, and Z. C. Liu, "Distortion compensation for generalized stereoscopic particle image velocimetry," Measurement Science and Technology, vol. 8, no. 12, pp. 1441-1454, 1997. https://doi.org/10.1088/0957-0233/8/12/008
  4. K. H. Chung, M. Barigou, and M. J. H. Simmons, "Reconstruction of 3-D flow field inside miniature stirred vessels using a 2-D PIV technique," Chemical Engineering Research & Design, vol. 85, no. 5, pp. 560-567, 2007. https://doi.org/10.1205/cherd06165
  5. V. S. Kendra, H. David, T. Daniel, and W. Geoffrey, "Volumetric three-component velocimetry measurements of the turbulent flow around a rushton turbine," Experiments in Fluids, vol. 48, no. 1, pp. 167-183, 2010. https://doi.org/10.1007/s00348-009-0711-9
  6. T. Hori and J. Sakakibara, "High-speed scanning stereoscopic PIV for 3D vorticity measurement in liquids," Measurement Science and Technology, vol. 15, no. 6, pp. 1067-1078, 2004. https://doi.org/10.1088/0957-0233/15/6/005
  7. D. H. Doh, T. G. Hwang, and T. Saga, "3D-PTV measurements of the wake of a sphere," Measurement Science and Technology, vol. 15, no. 6, pp. 1059-1066, 2004. https://doi.org/10.1088/0957-0233/15/6/004