A Numerical Study of the Influence of Particle Density on Lift Force-Induced Separation in a Micro-Separator/Classifier by a Macroscopic Particle Model
スポンサーリンク
概要
- 論文の詳細を見る
A Macroscopic Particle Model (MPM), which can be regarded as a quasi direct numerical simulation and hence does not need any drag and lift force models, is applied to examine the effect of particle density on lift force-induced separation in a micro-separator/classifier. The computational domain is a 30-degrees arc channel with a radius of 20 mm connecting to 5-mm straight channels at the both ends. In this study the modeled is an upper-half of the channel with a width of 200 μm and a depth of 75 μm. The particle diameter was chosen to be 20 μm, which is well separable in experiments and is suitable for MPM in which a particle should contain several fluid cells. The density was examined in the range of slightly lighter to denser, compared with water. The particle trajectories from representative points are predicted by MPM and also by a traditional particle tracking method (DPM) for comparison. The DPM without a lift force model predicted that the trajectories expanded over the cross-sectional plane with an increase of particle density since a secondary flow pattern called Dean vortices caused strong centrifugal force acting outwards from its center. On the other hand, the trajectories predicted by MPM were almost confined in the outer-half of the plane due to the lift force acting inwards to the vortex center. It seems that encountering lift force due to a steep shear and centrifugal force due to the Dean vortices are balanced regardless of the particle density since both forces likely increase with particle inertia. It is notable that particles can be hydraulically separable regardless of the density ranging slightly lighter to denser compared to the medium.
- 社団法人 化学工学会の論文
- 2007-11-01
著者
-
Ookawara Shinichi
Department of Chemical Engineering, Tokyo Institute of Technology
-
Agrawal Madhusuden
Ansys Inc.
-
Ogawa Kohei
Department of Chemical Engineering, Tokyo Institute of Technology
-
Ookawara Shinichi
Department Of Chemical Engineering Graduate School Of Science And Engineering Tokyo Institute Of Tec
-
Ogawa Kohei
Department Of Chemical Engineering Graduate School Of Science And Engineering Tokyo Institute Of Tec
-
Ogawa Kohei
Department Of Chemical Engineering Tokyo Institute Of Technology
-
Street David
Fluent Asia Pacific Co. Ltd.
-
AGRAWAL Madhusuden
Fluent Inc.
-
Ookawara Shinichi
Dep. Of Chemical Engineering Tokyo Inst. Of Technol.
関連論文
- A Numerical Study on Interparticle Collisions in a Microseparator/Classifier by a Macroscopic Particle Model
- Flow Properties of Newtonian and Non-Newtonian Fluid Downstream of Stenosis
- Size Distribution Function of Droplet in Liquid - Liquid Mixing and Bubble in Gas - Liquid Mixing, Crystal in Crystallization and Crushed Product in Crushing
- NON-NEWTONIAN FLOW CHARACTERISTICS OF BLOOD IN THE SHEAR RATE RANGE OF 100 - 10,000 s^
- Endoscopic treatment of biliary complications after right-lobe living-donor liver transplantation with duct-to-duct biliary anastomosis
- Subcapsular hematoma after right-lobe living-donor liver transplantation
- Impact of Enteral Nutrition in Adult-to-Adult Living Donor Liver Transplantation : A Preliminary Study
- Instantaneous Successive Particle Collisions with an Impeller in a Stirred Tank
- A New Graphical Method for Calculation of Mass Transfer Time in a Deep Bubble Bed
- The Effect of Superficial Gas Velocity and Aerated Liquid Height on the Spatial Distribution of Local Liquid-Phase Axial Dispersion Coefficients in a Bubble Column
- Time-Dependent Mixing Behaviors in Lower and Upper Zones of Bubble Column
- A Fundamental Approach to Bubble Column Scale-Up Based on Quality of Mixedness
- Close relation between 14q32/IGH translocations and chromosome 13 abnormalities in multiple myeloma : a high incidence of 11q13/CCND1 and 16q23/MAF
- Effects of Anions on ATP-Induced[Ca^]_i Increase in NG108-15 Cells
- Mixing Spectrum of an Impeller Based on Whole Mixing Capacity
- Drop Size Distribution in Liquid-Liquid Mixing
- PRESSURE DROP THOUGH PACKED BED
- Intrahepatic cholangiocarcinoma with increased serum CYFRA 21-1 level
- Quantitative Index for Anxiety/Expectation and Its Applications
- Unified Entry Length Correlation for Newtonian, Power Law and Bingham Fluids in Laminar Pipe Flow at Low Reynolds Number
- A Numerical Study on Interparticle Collisions in a Microseparator/Classifier by a Macroscopic Particle Model
- A Numerical Study of the Influence of Particle Density on Lift Force-Induced Separation in a Micro-Separator/Classifier by a Macroscopic Particle Model
- Visualization and VOF Modeling of Large Bubble Rising in Narrow Fixed Bed
- Inhibition of the Antibody Production by Acetaminophen Independent of Liver Injury in Mice
- CFD Simulation of Solid Suspension in a Stirred Tank
- The Effect of Mixedness on Crystal Size Distribution in a Continuous Crystallizer
- Contribution of ^F-fluorodeoxyglucose positron emission tomography to the diagnosis of early pancreatic carcinoma
- DISTRIBUTIONS OF PRESSURE AND FLOW RATE IN A HOLLOW-FIBER MEMBRANE MODULE FOR PLASMA SEPARATION
- EXPERIMENTAL STUDY OF FLOW MECHANICS IN A HOLLOW-FIBER MEMBRANE MODULE FOR PLASMA SEPARATION
- Mixing Spectrum of an Impeller Based on Whole Mixing Capacity
- Flow characteristics and circular pipe flow of pulp-suspension.
- A definition of separation efficiency.
- Laminar-turbulent velocity profile transition for flows in concentric annuli, parallel plates and pipes.
- An expression of energy spectrum function for wide wavenumber ranges.
- A DEFINITION OF QUALITY OF MIXEDNESS
- TURBULENCE IN IMPELLER STREAM IN A STIRRED VESSEL
- A way of pattern analysis of turbulent structure of low-frequency eddy-group in a circular pipe flow.
- Turbulent swirling flow in a circular pipe.
- MEASUREMENT OF THREE-DIMENSIONAL FLUCTUATING LIQUID VELOCITIES
- A STUDY OF MASS TRANSPORT IN TURBULENT FLOW
- TRANSITION FROM LAMINAR TO TURBULENT FLOW OF LIQUID IN A CIRCULAR PIPE