Volumetric 3-component velocimetry (v3v) measurements of the turbulent flow in stirred tank reactors

Volumetric 3-component velocimetry (V3V) measurements have been made of the flow field near a Rushton turbine in a stirred tank reactor. This particular flow field is highly unsteady and threedimensional, and is characterized by a strong radial jet, large tank-scale ring vortices, and small-scale blade tip vortices. V3V uses a single camera head with three apertures and particle tracking methods to obtain approximately 15,000 vectors in a cubic volume 10 cm on a side. The data are then interpolated onto a regular grid, allowing for the ensemble averaging of individual realizations and the calculation of gradientbased quantities such as vorticity. The volumetric velocity data from the present experiments offer the most comprehensive view to date of this flow field. The mean data clearly show the structure of the tip vortices and the Gaussian nature of the radial jet. The turbulent statistics reveal the production of turbulence in the high-shear region near the impeller.

[1]  H. V. Maanen,et al.  Laser-Doppler measurements of the turbulent flow in stirred vessels to establish scaling rules , 1978 .

[2]  S. Balachandar,et al.  Reynolds number scaling of flow in a Rushton turbine stirred tank. Part I - Mean flow, circular jet and tip vortex scaling , 2005 .

[3]  N. Malik,et al.  Particle tracking velocimetry in three-dimensional flows , 1993 .

[4]  Jürgen Kompenhans,et al.  Fundamentals of multiple plane stereo particle image velocimetry , 2000 .

[5]  Ronald Adrian,et al.  PIV study of small‐scale flow structure around a Rushton turbine , 2001 .

[6]  Z. C. Liu,et al.  Distortion compensation for generalized stereoscopic particle image velocimetry , 1997 .

[7]  W. Schröder,et al.  Time-resolved and volumetric PIV measurements of a transitional separation bubble on an SD7003 airfoil , 2008 .

[8]  G. K. Patterson,et al.  Laser-Doppler measurements of turbulent-flow parameters in a stirred mixer , 1989 .

[9]  K. Hinsch.  Three-Dimensional Particle Velocimetry , 1995 .

[10]  Ye Pu,et al.  Holographic particle image velocimetry: from film to digital recording , 2004 .

[11]  Jun Sakakibara,et al.  High-speed scanning stereoscopic PIV for 3D vorticity measurement in liquids , 2004 .

[12]  Bernhard Wieneke,et al.  Tomographic particle image velocimetry , 2006 .

[13]  Melanie Voges,et al.  Combined PIV and DGV applied to a pressurized gas turbine combustion facility , 2006 .

[14]  Andreas Schröder,et al.  Investigation of a turbulent spot and a tripped turbulent boundary layer flow using time-resolved tomographic PIV , 2008 .

[15]  R. Adrian.  Particle-Imaging Techniques for Experimental Fluid Mechanics , 1991 .

[16]  M. Wernet.  Planar particle imaging Doppler velocimetry: a hybrid PIV/DGV technique for three-component velocity measurements , 2004 .

[17]  K. Van't Riet,et al.  The trailing vortex system produced by Rushton turbine agitators , 1975 .

[18]  T. Dracos,et al.  3D PTV and its application on Lagrangian motion , 1997 .

[19]  R. Adrian.  Twenty years of particle image velocimetry , 2005 .

[20]  Armin Gruen,et al.  Particle tracking velocimetry in three-dimensional flows , 1993, Experiments in Fluids.

[21]  Kazuo Ohmi,et al.  Particle-tracking velocimetry with new algorithms , 2000 .

[22]  Ronald Adrian,et al.  Stereoscopic particle image velocimetry measurements of the flow around a Rushton turbine , 2000 .

[23]  Ajay K. Prasad,et al.  Stereoscopic particle image velocimetry , 2000 .