کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7054222 1458017 2018 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A lattice Boltzmann study on dendritic growth of a binary alloy in the presence of melt convection
ترجمه فارسی عنوان
یک مطالعه شبکه بولتزمن در مورد رشد دندریتیک آلیاژ دوتایی در حضور کنسانتره ذوب
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
A multi-relaxation-time (MRT) lattice Boltzmann (LB) based model is utilized to simulate the dendritic growth with melt convection in solidification of alloys. It models melt convection by the MRT-LB equation and solute transport by a conservation equation with a pseudo-potential function. The D2Q9 lattice vectors are proposed to describe interface advancement in the liquid-solid transition. Effects of undercoolings, interface curvature and preferred growth orientation are incorporated into the model implicitly. After model validation, dendritic growth under several conditions of pure diffusion and melt convection was numerically investigated, and the solidification entropies were proposed to quantitatively characterize the solidification system. The result shows that the growth behavior, microstructure formation and solute segregation are significantly influenced by melt convection. The solidification entropies reflecting complexity of the solidification system are useful to characterize dendritic growth and solute segregation. This work offers a potential solution for studies of microstructure evolution in solidification of alloys.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 123, August 2018, Pages 213-226
نویسندگان
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