  This work explores the dynamics of capillary effects in pure H2O excited by
hydrodynamic cavitation, which has been reported to introduce a non-equilibrium
state of para- and ortho- isomers of water. Differential measurements are
conducted with 0.3mm and 0.5mm capillary tubes and precision digital vernier
height gauges. Water samples are degassed at -0.09 MPa, their temperature is
equalized. Since the non-equilibrium state of isomers is expected to exist in
ice-like building blocks near the water interfaces, the immersion depth of
capillary tubes was set to 10mm, 2mm and about 0.1mm below the surface. The
measurement results show the difference in surface tension of 6.7%-11.3% with a
maximum value of about 15.7% between control and experimental samples. These
effects in near-surface layers are observed within 30-60 minutes after the
excitation. Experimental samples taken from the surface demonstrate movement
about 2 times longer than control ones; their values are largest in the whole
series of experiments. Micro-manipulation tool recorded an interesting effect
of stopping the liquid in capillary tubes, observed mostly in experimental
samples, where the meniscus and surface tension oscillated at 0.05-0.1mm level.
The described approach has two main applications. First, the measurement system
can be used as the fast and cost effective detector of spin-based phenomena
that affect viscosity and surface tension. Second, since the capillary effects
plays an important role in aquaporin channels and plant water transportation
system, these techniques can be applied in phytosensing, in particular, in sap
flow measurements, and in a hydroponic production.
