铸造技术2017，Vol.38Issue(5)：1088-1094,7.DOI:10.16410/j.issn1000-8365.2017.05.027
基于CA-LBM模型的枝晶非对称生长行为研究
Study of Dendritic Asymmetrical Growth Behavior Based on CA-LBM Model
摘要
Abstract
A new two-dimensional model used to simulate heat transport,fluid flow,solute diffusion,and dendritic growth of single phase alloy solid solution in solidification process was developed by the lattice Boltzmann model (LBM) and the cellular automaton (CA).The effect of different process condition on dendritic asymmetrical growth behavior under forced convection was studied.The simulation results show that the forced convection results in the asymmetrical dendritic growth and the efficiency of dendritic growth increases,compared with that without accounting for convection.When changing solidification conditions,the dendritic asymmetrical growth behavior also changes accordingly.The smaller the initial subcooling,the greater the convective velocity and the smaller the cooling rate,dendritic asymmetric growth behavior tends to be stronger.关键词
合金凝固/数值模拟/微观组织/CA-LBM/枝晶非对称性生长Key words
alloy solidification/numerical simulation/microstructure/CA-LBM/dendritic asymmetrical growth分类
矿业与冶金引用本文复制引用
周靖超,李日,杨莹莹,赵朝阳..基于CA-LBM模型的枝晶非对称生长行为研究[J].铸造技术,2017,38(5):1088-1094,7.基金项目
国家自然科学基金项目(51475138) （51475138）
国家重点基础研究发展计划项目(2011CB610402) （2011CB610402）
