Related Experiment Video
Updated: Feb 5, 2026

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
Published on: June 9, 2016
Agglomerate Breakup of Destabilized Polystyrene Particles under a Cross-Channel Planar Extensional Flow
Youngseok Kim1, Dae Yeon Kim1, Joung Sook Hong1
1School of Chemical and Biological Engineering, Institute of Chemical Processes , Seoul National University , Seoul 08826 , Korea.
Abstract:
Deformation and breakup of a single agglomerate exposed to pure planar extensional flow in a cross-channel were experimentally investigated. Aggregation was generated by applying shear with destabilized polystyrene particles, and the fractal dimension, df, of the agglomerate was 2.25. The aggregation focused on the center of the channel by sheath flow was rotated while approaching stagnant point. Then, the aspect ratio increased as it deformed close to the stagnant point. The probability of the breakup and the fragment distribution were dependent upon the viscosity and flow rate and were superimposed on a master curve as a function of applied stress. With the increase in stress, the projected area of the fragment that was split by the flow decreased with a power-law relationship, and the exponent was in agreement with the model prediction.
More Related Videos
07:01Preparation of Hollow Polystyrene Particles and Microcapsules by Radical Polymerization of Janus Droplets Consisting of Hydrocarbon and Fluorocarbon Oils
Published on: January 25, 2018
09:45Separating Beads and Cells in Multi-channel Microfluidic Devices Using Dielectrophoresis and Laminar Flow
Published on: February 4, 2011
Related Concept Videos
Uniform Depth Channel Flow
Energy Considerations in Open Channel Flow
Destabilization of Microtubules
Uniform Depth Channel Flow: Problem Solving
Drugs that Destabilize Microtubules
Crystal Field Theory - Tetrahedral and Square Planar Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...