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采用国内外描述相变微观结构的相场模型,将果汁体系视为水和溶质组成的二元系统,探究各向异性系数取值对冰晶相貌及溶质分布模拟的的影响.结果表明:随着各向异性系数的增大,冰晶的二次分枝越来越发达,其尖端生长速度变快,且尖端速度波动的幅值增大;冰晶生长速度越快,则凝固时间越短,溶质扩散层越薄.各向异性系数在0.025左右取值,较能反映冰晶实际生长形貌.
The phase-field model describing the phase-change microstructure at home and abroad is adopted to consider the juice system as a binary system composed of water and solute, and to investigate the influence of the anisotropy coefficient on the ice crystal appearance and solute distribution simulation. The results show that with the With the increase of anisotropy coefficient, the secondary branches of ice crystals are more and more developed, the tip growth rate becomes faster and the amplitude of tip velocity fluctuation increases. The faster ice crystal growth rate, the shorter the solidification time, the longer the solute diffusion The thinner the layer, the anisotropic coefficient is about 0.025, which reflects the actual growth of ice crystals.