2024-03-29T05:45:21Z
https://kitami-it.repo.nii.ac.jp/oai
oai:kitami-it.repo.nii.ac.jp:00008028
2022-12-13T02:24:57Z
1:86
Voronoi Dynamics Simulation of Development of Lamellar Microstructure in Sea Ice
海氷の層状微視組織形成のボロノイダイナミクスシミュレーション
Voronoi Dynamics Simulation of Development of Lamellar Microstructure in Sea Ice
河野, 義樹
大橋, 鉄也
Sea Ice
Crystal Growth
Microstructure
Brine Region
Ice Platelet
Developments of sea ice polycrystals from the sea surface are simulated in two-dimensional approximation by combining numerical methods for crystal growth, salinity diffusion and flux of heat. An anisotropic growth of ice crystals from a number of nuclei and their mutual impingements are numerically reproduced by a simple and novel technique, named Voronoi dynamics. Discharge of salt from solidified region and salinity condensation at the solid-liquid interface are also taken into consideration. Diffusion process of salinity and heat flux are evaluated by solving equations for diffusion and heat conduction, and growth of ice crystals is affected by these two factors. Results show that a layer of granular grains is formed near the sea surface and columnar shaped grains develop below it. Brine regions are mainly formed along grain boundaries in the layer of granular grains. In the region of columnar shaped grains, brine regions exist not only along grain boundaries but also inside grains. Columnar shaped crystal grains consist of ice platelets growing in the vertical direction and brine layers between them. These microstructural features are in accordance with experimental observations.
journal article
一般社団法人日本機械学会
2008-07
application/pdf
日本機械学會論文集. A編
743
74
946
953
https://kitami-it.repo.nii.ac.jp/record/8028/files/2008_海氷の層状微視組織形成のボロノイダイナミクスシミュレーション.pdf
jpn
http://doi.org/10.1299/kikaia.74.946
c 2008 一般社団法人日本機械学会
open access