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Abstract
Induced mechanical energy in a thin film of
liquid in an inclined rapidly rotating tube in the vortex fluidic device (VFD)
can be harnessed for generating non-equilibrium conditions, which are optimal
at 45o tilt angle, but the nature of the fluid flow is not understood.
Through understanding that the fluid exhibits resonance behaviours from the
confining boundaries of the glass surface and the meniscus that determines the
liquid film thickness, we have established specific topological mass transport
regimes. These topologies have been established through materials processing,
as circular flow normal to the surface of the tube, double-helical flow across
the thin film, and spicular flow, a transitional region where both effects
contribute. This includes new phenomenological shear stressed crystallization
and molecular drilling. The manifestation of these patterns has been observed
by monitoring mixing times, temperature profiles, and film thickness against
rotational speed of liquids in the tube. The grand sum of the different
behavioural regimes is a general fluid flow model that accounts for all
processing in the VFD at an optimal tilt angle of 45o, and provides
a new concept in the fabrication of novel nanomaterials and controlling the
organisation of matter.
Content
Supplementary material
SR Supplementary information.Master
