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Journal Article

Meniscus arrest during capillary rise in asymmetric microfluidic pore junctions

MPS-Authors

Jung,  Michael
Group Geometry of Fluid Interfaces, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

Seemann,  Ralf
Group Geometry of Fluid Interfaces, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Citation

Sadjadi, Z., Jung, M., Seemann, R., & Rieger, H. (2015). Meniscus arrest during capillary rise in asymmetric microfluidic pore junctions. Langmuir, 31(8), 2600-2608. doi:10.1021/la504149r.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-6116-7
Abstract
The capillary rise of liquid in asymmetric channel junctions with branches of different radii can lead to long-lasting meniscus arrests in the wider channel, which has important implications for the morphology and dynamical broadening of imbibition fronts in porous materials with elongated pores. Using a microfluidic setup, we experimentally demonstrate the existence of arrest events in Y-shaped junctions, and measure their duration and compare them with theoretical predictions. For various ratios of the channel width and liquid viscosities and for different values of the feeding channel length, we find that the meniscus within the wider branch is arrested for a time that is proportional to the time that the meniscus needed to reach the junction, in very good quantitative agreement with theoretical predictions.