PIV Measurement of the Fluidized Particles’ Velocity Field in a Cylindrical Spouted Bed

Abstract:

In this paper, the instantaneous velocity fields of the particles in the spouted bed were measured by the particle image velocimetry (PIV). In the experiment, the spouted particles achieved the visible accumulation effect when the fountain height was 0.85 times of the packed bed height h. Since the particles are dispersed with each other, the PIV recordings were evaluated by the multiple-pass recursive method based on the FFT cross-correlation algorithm. The time-averaged velocity field of the particles obtained from the PIV experiment had similar distribution with the velocity field calculated by the numerical simulation. In the averaged particle velocity field, there was a continuous region which divided the whole flow field into two parts. The particle velocities in the region approximated to zero especially in vertical direction, which means the particles with upwards motion were basically equated to those with downwards motion in the region. Therefore the effects of particles’ face-to-face friction and even abrasion were much stronger in the region. Further, the experimental results also show that the area of the region could be about 11.19% of the whole flow field.

• Periodical: Advanced Materials Research (Volumes 560-561)
• Pages: 632-636
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.560-561.632
• Online since: August 2012
• Authors: Peng Fei Gao, Bin Yang, Ming Gong, Xiao Xun Ma
• Keywords: Abrasion, PIV, Regression Algorithm, Spouted Bed, Velocity Field

References

[1] G.Q. Liu, S.Q. Li, X.L. Zhao, Q. Yao, Experimental study on pulsant behaviors of particle flow in a two-dimensional spouted bed, Journal of Engineering Thermophysics. 28(2007) 515-518.

[2] M. Cassanello, F. Larachi, R. Legros, et al，Solids Dynamics from Experimental Trajectory Time-Series of a Single Particle Motion in Gas-Spouted Beds, Chemical Engineering Science, 54(1999) 2545-2554.

DOI: 10.1016/s0009-2509(98)00468-0

[3] R. J. Adrian, Particle-image technique for experimental fluid mechanics, Annual Review of Fluid Mechanics. 23(1991) 261-304.

DOI: 10.1146/annurev.fl.23.010191.001401

[4] H.X. Shi, Q.H. Wang, Z.Y. Luo, K.F. Cen, The application of PIV in gas-solid multiphase flow, Power Engineering. 22(2002)1589-1592.

[5] T.Q. Luo, X.X. Zhao, W.M. Liu, S.Y. Xu, D. Liu, Coarse particle flow behavior in draft tube of spouted bed, Journal of Jiangsu University(Natural Science Edition). 28(2007)138-141.

[6] G. Liu, S. Li, X. Zhao, Q. Yao, Experimental studies of particle flow dynamics in a two-dimensional spouted bed, Chemical Engineering Science. 63(2008)1131-1141.

DOI: 10.1016/j.ces.2007.11.013

[7] T. Xue, W. J. Qu, X.D. Meng, T. Zhang, Complete approach to velocity field measurement with improved image cross-correlation method in gas-liquid two phase flow, Journal of Optoelectronics.Laser. 21(2010)903-904.

[8] L.C. Gui, W.Merzkirch, A method of tracking ensembles of particle images, Experiments in Fluids. 21(1996)465-468.

DOI: 10.1007/bf00189049

[9] V. DamodaraDas, M.S. MuraliSastry, Manjunatha Pattabi, Ageing studies of discontinuous copper and silver thin films, J. Mater. Sci. 22(1987)264-268.

DOI: 10.1007/bf01160582

[10] B. Yang, Y. Wang, Y. Zhang, Simultaneous velocity measurement of gas-solid phase in eolian sediment transport by Particle Image Velocimetry-Planar Laser Induced Fluorescence, Journal of XI'AN JIAOTONG University. 43(2009)101-104.