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Related Experiment Videos

Experimental study of small aggregate settling.

F Gruy1, P Cugniet

  • 1Ecole des Mines de Saint-Etienne, 158, cours Fauriel, 42023 Saint-Etienne Cedex 2, France. gruy@emse.fr

Journal of Colloid and Interface Science
|March 19, 2004
PubMed
Summary

This study quantifies the drag coefficient and hydrodynamic radius of particle aggregates in crystallization science. Findings reveal aggregate hydrodynamic radius closely matches the radius derived from average projected area, applicable to various aggregate sizes.

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Mathematical modeling of T-cell activation kinetic.

Journal of computational biology : a journal of computational molecular cell biologyยท2008
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Area of Science:

  • Fluid dynamics
  • Crystallization science
  • Particle science

Background:

  • Drag coefficient and hydrodynamic radius are critical for understanding particle behavior in crystallization.
  • Micrometric particle aggregates are commonly formed in stirred crystallizers.
  • Accurate characterization of these aggregates is essential for process optimization.

Purpose of the Study:

  • To experimentally determine the drag coefficient of macroscopic particle aggregates.
  • To investigate the relationship between aggregate size, porosity, and hydrodynamic radius.
  • To provide data applicable to particle behavior in stirred crystallizers.

Main Methods:

  • Settling measurements of glass bead aggregates (2-100 particles) in glycerol.
  • Calculation of drag coefficient under Stokesian flow conditions.

Related Experiment Videos

  • Determination of hydrodynamic radius based on settling velocity and projected area.

    • Main Results:

    • Experimental drag coefficients for macroscopic aggregates were measured.
    • The hydrodynamic radius of aggregates closely approximates the radius calculated from average projected area.
    • This finding holds true for larger and more porous aggregates.

    Conclusions:

    • The hydrodynamic radius can be reliably estimated from the average projected area for particle aggregates.
    • Results offer valuable insights into particle dynamics within crystallization processes.
    • The study provides a method for characterizing aggregate properties relevant to industrial applications.