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Mathematical modelling of nucleation and growth of crystals with buoyancy effects

机译:浮力效应的核心成核和生长的数学建模

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A complete analytical solution of the integro-differential model describing the nucleation of crystals and their subsequent growth in a binary system with allowance for buoyancy forces is constructed. An exact analytical solution of the Fokker-Planck-type equation for the three-parameter density distribution function is found for arbitrary nucleation kinetics. Two important cases of the Weber-Volmer-Frenkel-Zel'dovich and Meirs kinetics are considered in some detail. It is shown that the solute concentration decreases and the distribution function increases with increasing the melt supercooling (with increasing the depth of a metastable system). It is demonstrated that the distribution function attains its minimum at a certain size of crystals owing to buoyancy forces.
机译:构建了描述晶体成核的积分差分模型的完整分析解及其在具有浮气力的余量的二元系统中的随后生长。 发现了三个参数密度分布函数的Fokker-Planck型方程的精确分析解决方案对于任意成核动力学。 一些重要的Weber-Volmer-Frenkel-Zel'dovich和Meirs动力学的重要案例在一些细节中考虑。 结果表明,随着熔融过冷(增加了亚稳态系统的深度),溶质浓度降低,分布函数增加(随着亚稳态系统的深度)。 证明,由于浮力力,分布函数在一定尺寸的晶体中达到其最小值。

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