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Paper   IPM / Physic / 11575
School of Physics
  Title:   Simulation of Droplet Trains in Microfluidic Networks
1.  M. Djalali Behzad
2.  H. Seyed-Allaei
3.  M.R. Ejtehadi
  Status:   Published
  Journal: Phys. Rev. E
  Vol.:  82
  Year:  2010
  Pages:   037303
  Supported by:  IPM
We show that in a microfluidic network with low Reynolds numbers, a system can be irreversible due to hysteresis effects. We simulated a network of pipes that was used in a recent experiment. The network consists of one loop connected to input and output pipes. A train of droplets enters the system at a uniform rate, but the droplets may leave the system in a periodic or even a chaotic pattern. The output pattern depends on the time interval between incoming droplets as well as the network geometry. For some parameters, the system is not reversible.

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