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Monodisperse droplet formation for both low and high capillary numbers in a T-junction microdroplet generator.
- Source :
-
Chemical Engineering Science . Nov2021, Vol. 243, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- • Precise control of the droplet size is of significant importance for the applications of droplet microfluidic systems. • In a T-junction microdroplet generator, for both low and high capillary numbers of droplet formation, the relation between the droplet length and the flow-rate ratio of the fluids is measured experimentally. • More importantly, based on the closed-loop control droplet microfluidic system, precise control of the droplet size can be achieved for both low and high capillary numbers of monodisperse droplet formation. In a T-junction microdroplet generator, the relation between the droplet length and the flow-rate ratio of the immiscible fluids is studied experimentally at both low and high capillary numbers. In particular, different geometries of the T-junctions are designed for monodisperse droplet formation, and the droplet length as a function of the flow-rate ratio is measured for various viscosity of the fluids. It is observed that there is a linear relation between the droplet length and the flow-rate ratio at a low capillary number(C a ⩽ 0.1), while the droplet length is varying nonlinearly with the flow-rate ratio at a high capillary number(0.1 ⩽ C a ⩽ 1.0). More importantly, by using the feedback control of the droplet size, a closed-loop control droplet microfluidic system is demonstrated. Especially, by choosing specific control method, good agreements are shown between the predicted and the measured droplet size for a wide range of the capillary numbers of monodisperse droplet production. [ABSTRACT FROM AUTHOR]
- Subjects :
- *MONODISPERSE colloids
*CAPILLARIES
Subjects
Details
- Language :
- English
- ISSN :
- 00092509
- Volume :
- 243
- Database :
- Academic Search Index
- Journal :
- Chemical Engineering Science
- Publication Type :
- Academic Journal
- Accession number :
- 150817543
- Full Text :
- https://doi.org/10.1016/j.ces.2021.116799