Analytical relations for long-droplet breakup in asymmetric T junctions

Bedram, A ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. DOI: 10.1103/PhysRevE.91.053012
  3. Publisher: American Physical Society , 2015
  4. Abstract:
  5. We develop accurate analytical relations for the droplet volume ratio, droplet length during breakup process, and pressure drop of asymmetric T junctions with a valve in each of the branches for producing unequal-sized droplets. An important advantage of this system is that after manufacturing the system, the size of the generated droplets can be changed simply by adjusting the valves. The results indicate that if the valve ratio is smaller than 0.65, the system enters a nonbreakup regime. Also the pressure drop does not depend on the time and decreases by increasing the valve ratio, namely, opening the degree of valve 1 to valve 2. In addition, the results reveal that by decreasing (increasing) the valve ratio, the droplet length of branch 1 decreases (increases) and the droplet length of branch 2 increases (decreases) linearly while the whole length of the droplet remains unchanged
  6. Keywords:
  7. Drops ; Intersections ; Pressure drop ; Analytical relations ; Droplet breakup ; Droplet length ; Droplet volume ; T junctions ; Valve ratio ; Whole lengths ; Drop breakup ; Microfluidics ; Theoretical model ; Microfluidics ; Models, Theoretical ; Pressure
  8. Source: Physical Review E - Statistical, Nonlinear, and Soft Matter Physics ; Volume 91, Issue 5 , May , 2015 ; 15393755 (ISSN)
  9. URL: http://journals.aps.org/pre/abstract/10.1103/PhysRevE.91.053012