气泡对纯冰三结迁移的阻力效应

IF 0.5 Q4 ECOLOGY

Czech Polar Reports Pub Date : 2021-01-01 DOI:10.5817/cpr2021-1-7

P. I. Achával, C. L. Di Prinzio

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引用次数: 0

摘要

在-2°C条件下，研究了晶粒三重结在冰纯样品上的迁移。本文研究了晶界(GB)与气泡之间的相互作用。从LEICA®光学显微镜获得的连续照片中记录了三重结的演变。同时，采用蒙特卡罗方法对具有可移动气泡的晶粒三结进行了数值模拟，模拟条件为:保持块状气泡不移动，允许块状气泡移动。此外，移动泡沫被迫留在英国国内。模拟结果表明，气泡减缓了GB和三重结的运动。所得的模拟三重结与实验三重结的几何形状吻合较好，所得的GB扩散系数值与相同温度下的实验测量值和其他作者报道的值吻合。最后，验证了移动气泡的阻力对GB迁移的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The drag effect of air bubbles on triple junction migration of pure ice

The migration of a grain triple junction was studied on ice pure samples with bubbles at -2°C for almost 3 h. This work studies the interaction between Grain Boundary (GB) and bubbles. The evolution of the triple junction was recorded from successive photographs obtained from a LEICA® optical microscope. Simultaneously, numerical simulations of grain triple junction with mobile bubbles were carried out using Monte Carlo method with the following conditions: The bubbles in the bulk were kept immobile and those in the GB were allowed to move. In addition, mobile bubbles were forced to stay inside the GB. The simulations show that bubbles slow down the movement of the GB and of the triple junction. What’s more, the simulated triple junction obtained fits very well the experimental triple junction geometry, and the GB diffusivity values obtained coincide with those measured experimentally at the same temperature and reported by other authors. Finally, the drag effect of the mobile bubbles on the GB migration was verified.

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来源期刊

Czech Polar Reports Agricultural and Biological Sciences-Agricultural and Biological Sciences (all)

CiteScore

1.30

自引率

10.00%

发文量

期刊介绍： Czech Polar Reports is an international, multidisciplinary, peer-reviewed journal. It is issued 2 times a year. The journal is dedicated to provide original research papers for sciences related to the polar regions and other planets with polar analogues. Czech Polar Reports covers the disciplines listed below. polar paleontology, geology, geochemistry, geomorphology, glaciology, climatology, hydrology, pedology, biochemistry, ecology, environmental science, microbiology, plant and animal biology including marine biology.