Abstract
This paper describes an experimental study on the development of water veins along three-grain intersections in pure water ice kept at the melting point. The diameter of a water vein D (μm) increases with the lapse of time t (hours) : D=2.61t0.56. Results of the experiment are applied to explain the formation of radially-grown meltpatterns on the snow-covered surface of lake ice. This pattern has been observed as a result of gushing of water through a hole formed in the snow-covered ice. As one of the causes contribuing to the formation of watergushing holes, the water vein development along the three-grain intersections in crystal grain boundaries is experimentally examined. Further, the effect of light irradiation on the ice sample is investigated in relation to the enhancement of formation of water veins.
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