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Related Concept Videos

Overview Of Cell Separation And Isolation01:20

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Cell separation was first achieved in 1964 by S. H. Seal, who separated large tumor cells from the smaller blood cells using filtration. Two years later, Pohl and Hawk performed experiments on how cells respond differently to a nonuniform electric field based on the cell type. Such observations were the inception of cell separation methods, which allow isolating a single cell type from a heterogeneous sample.
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Separating Beads and Cells in Multi-channel Microfluidic Devices Using Dielectrophoresis and Laminar Flow
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IB-LBM study on cell sorting by pinched flow fractionation.

Jingtao Ma1, Yuanqing Xu1, Fangbao Tian2

  • 1School of Life Science, Beijing Institute of Technology, Beijing 100081, China.

Bio-Medical Materials and Engineering
|September 18, 2014
PubMed
Summary

This study simulates cell separation in pinched flow fractionation (PFF) using immersed boundary-lattice Boltzmann method (IB-LBM). Optimal flow rates and cell spacing are identified for efficient separation, improving PFF device design.

Keywords:
IB-LBMcell separationpinched ow fractionation

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Area of Science:

  • Fluid dynamics
  • Biotechnology
  • Computational modeling

Background:

  • Pinched flow fractionation (PFF) is a microfluidic technique for cell separation.
  • Accurate simulation of cell behavior in PFF is crucial for optimizing device performance.
  • Existing empirical formulas may not fully capture complex cell dynamics during separation.

Purpose of the Study:

  • To simulate and analyze cell separation in PFF devices using the immersed boundary-lattice Boltzmann method (IB-LBM).
  • To investigate the impact of various parameters on separation efficiency.
  • To compare simulation results with empirical predictions and provide design recommendations for PFF devices.

Main Methods:

  • Utilized the immersed boundary-lattice Boltzmann method (IB-LBM) for numerical simulation.
  • Investigated separation performance at low Reynolds number (Re ≈ 1).
  • Varied parameters including pinched segment width, flow ratios, cell flexibility, and inter-cell distances.

Main Results:

  • Ideal separation performance requires the diluent flow rate to be approximately equal to or greater than the particle solution flow rate.
  • Discrepancies between numerical simulation and empirical predictions increase with cell flexibility.
  • Close cell proximity can cause cell banding, leading to incomplete separation; relative cell positions are critical.

Conclusions:

  • The IB-LBM simulation provides insights into PFF cell separation dynamics.
  • Findings suggest optimal flow rate and cell spacing for enhanced PFF device design.
  • This research may lead to new applications and improved PFF device engineering.