Using Positron Emission Particle Tracking (PEPT) to Study Mixing in Stirred Vessels: Validation and Tackling Unsolved Problems in Opaque Systems

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Luke Adams¹  Alvin William Nienow¹  Antonio Guida¹  David J. Parker²  Mostafa Barigou¹  Fabio Chiti¹  Paulina Pianko-Oprych¹  Xianfeng Fan² 

[1] Department of Chemical Engineering, University of Birmingham;School of Physics and Astronomy, University of Birmingham

关键词: PEPT;    Liquid Mixing;    Solids Distribution;    Shear-Thinning Slurry;    Lagrangian Data;   

DOI  :  10.1252/jcej.08we262

来源: Maruzen Company Ltd

【 摘 要 】

References(15)Cited-By(11)Positron emission particle tracking (PEPT) is a new technique allowing the quantitative study of flow phenomena in three dimensions in opaque systems that cannot be studied by techniques based on optical methods such as particle image velocimetry (PIV) or Laser Doppler anemometry (LDA). Here, the technique is initially described along with studies validating the technique, comparing velocity profiles from a Rushton and a pitched blade turbine in turbulent transparent systems from PEPT with PIV and LDA. Subsequently, results are presented showing, for the first time, the spatial distribution of suspended particles of two sizes throughout the vessel; and velocity profiles for the solid and liquid phase in low viscosity and high solid concentration three-phase (s–g–l) systems under fully turbulent conditions. Finally, three-dimensional flow fields, occupancy maps and Poincaré maps are presented, again for the first time, arising from the mixing of two different non-Newtonian shear thinning yield stress slurries. Clearly, PEPT offers many possibilities for obtaining quantitative data previously unobtainable for a wide range of important mixing problems relevant to a broad spectrum of the process industries.

【 授权许可】

Unknown