Segmented flows of viscous threads in microchannels
نویسندگان
چکیده
منابع مشابه
Capillary threads and viscous droplets in square microchannels
We experimentally study the formation and evolution of threads containing more viscous liquids surrounded by less viscous, immiscible liquids through hydrodynamic focusing in square microchannels. Over a large range of viscosities and interfacial tensions, five characteristic regimes of flow behavior are identified: threading, jetting, dripping, tubing, and displacement. We locate the boundarie...
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A one-dimensional model evolution equation is used to describe the nonlinear dynamics that can lead to the breakup of a cylindrical thread of Newtonian uid when capillary forces drive the motion. The model is derived from the Stokes equations by use of rational asymptotic expansions and under a slender jet approximation. The equations are solved numerically and the jet radius is found to vanish...
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ژورنال
عنوان ژورنال: Physical Review Fluids
سال: 2019
ISSN: 2469-990X
DOI: 10.1103/physrevfluids.4.084201