Numerical investigation of the effect of number and shape of inlet of cyclone and particle size on particle separation

2016 ◽  
Vol 53 (6) ◽  
pp. 2009-2016 ◽  
Author(s):  
Iman Khazaee
Keyword(s):  
Particle Size ◽  
Numerical Investigation ◽  
Particle Separation

Separation characteristics in dissolved air flotation - pilot and full-scale demonstration

2003 ◽  
Vol 48 (3) ◽  
pp. 89-96
Author(s):  
M. Ljunggren ◽  
L. Jönsson
Keyword(s):  
Particle Size ◽  
Contact Zone ◽  
Separation Efficiency ◽  
Particle Separation ◽  
Full Scale ◽  
Particle Sizes ◽  
Dissolved Air Flotation ◽  
Air Flotation ◽  
Practical Implications ◽  
Dissolved Air

This study presents practical implications for particle separation in Dissolved Air Flotation (DAF). The objectives were to localise where particles are separated from the water phase and to determine what particles, in terms of size, are removed by the DAF-process. Both pilot- and full-scale plants were investigated. Particle sizes were analysed with a light-blocking particle counter and an optical borescope was used for visualisation of particle-bubble aggregates. It was found that particles are preferably separated upstream in the process, i.e. close to the contact zone. Furthermore, separation efficiency for particles increased with increasing particle size.

Comprehensive understanding of nano-sized particle separation processes using nanoparticle tracking analysis

2015 ◽  
Vol 72 (12) ◽  
pp. 2318-2324 ◽  
Author(s):  
Desmond F. Lawler ◽  
Sungmin Youn ◽  
Tongren Zhu ◽  
Ijung Kim ◽  
Boris L. T. Lau
Keyword(s):  
Particle Size ◽  
Particle Separation ◽  
Size Distributions ◽  
Nanoparticle Tracking Analysis ◽  
Particle Size Distributions ◽  
Comprehensive Understanding ◽  
Separation Processes ◽  
Qualitative And Quantitative ◽  
Direct Observations ◽  
Quantitative Understanding

The understanding of nano-sized particle separation processes has been limited by difficulties of nanoparticle characterization. In this study, nanoparticle tracking analysis (NTA) was deployed to evaluate the absolute particle size distributions in laboratory scale flocculation and filtration experiments with silver nanoparticles. The results from NTA were consistent with standard theories of particle destabilization and transport. Direct observations of changes in absolute particle size distributions from NTA enhance both qualitative and quantitative understanding of particle separation processes of nano-sized particles.

Direct Numerical Simulation of Particle Separation by Direct Current Dielectrophoresis

2009 ◽  
Author(s):  
Ye Ai ◽  
Sang W. Joo ◽  
Sheng Liu ◽  
Shizhi Qian
Keyword(s):  
Particle Size ◽  
Electric Field ◽  
Stokes Equations ◽  
Microfluidic Channel ◽  
Particle Separation ◽  
Element Model ◽  
Navier Stokes ◽  
Arbitrary Lagrangian Eulerian ◽  
Design And Optimization ◽  
Numerical Predictions

DC dielectrophoretic (DEP) separation of particles through a constricted microchannel was numerically investigated by a verified multiphysics finite element model, composed of the Navier-Stokes equations for the flow field and the Laplace equation for the electric field solved in an arbitrary Lagrangian-Eulerian (ALE) framework. The particle-fluid-electric field interactions are fully taken into account in the present model. The numerical predictions are in qualitative agreement with the existing experimental results obtained from the literature. The DEP particle separation depends on the particle size and zeta potential. The separation threshold of the particle size can be controlled by adjusting the applied electric field and the constriction ratio of the microfluidic channel. The proposed numerical model can be utilized for the design and optimization of a real microfluidic device for DEP particle separation.

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