One- and two-particle dynamics in microfluidic T-junctions

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Advances in precise focusing of colloidal particles in microfluidic systems open up the possibility of using microfluidic junctions for particle separation and filtering applications. We present a comprehensive numerical study of the dynamics of solid and porous microparticles in T-shaped junctions. Good agreement with experimental data is obtained on the location of particle-separating streamlines for single solid particles with realistic parameters corresponding to the experiments. We quantify the changes in the position of the separating line for porous, partially penetrable colloids. A prediction of the full phase diagram for particle separation is presented in the case of two successive particles entering a T-junction. Our results suggest the intriguing possibility of using the one- and two-particle T-junctions as logic gates.


Original languageEnglish
Article number050302
Pages (from-to)1-5
JournalPhysical Review E
Issue number5
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

    Research areas

  • colloid, colloidal computer, complex fluid, controlled delivery

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