【摘要】 在自然环境和工业系统中为了促进/抑制冰的形成，采用相场-粒子玻尔兹曼方法模拟了冰单晶核的生长演化过程，并分析背景流场条件对单晶核晶枝生长的影响.结果表明：背景流场使枝晶生长呈现不对称形状，即迎流侧的单晶核晶枝远比背流侧晶枝发达；迎流侧晶枝顶端生长速率远大于背流侧的枝晶生长速率，上游侧的晶枝尖端半径大于背流侧的晶枝尖端半径；在有背景流场条件下，单晶核的固相比大于无背景流场.背景流场的流速越高，迎流侧枝晶越发达，枝晶生长速度越快，枝晶尖端生长速度也越快.背流侧的流场流速较低，过冷度低于迎流侧，抑制了凝固过程，生长速度较慢，枝晶生长受到抑制.更多还原

【Abstract】 To promote/inhibit ice formation in the natural environment and industrial systems, the growth and evolution process of ice single-crystal nuclei were simulated using the phase field-lattice Boltzmann method(PF-LBM), and the influence of a background flow field on the growth of single-crystal nucleus dendrites was also analyzed. The results show that the flow field makes dendrite growth asymmetric. The growth of dendrites is more developed on the upstream side than on the downstream side. The dendrite tip growth rate and tip radius are greater on the upstream side than on the downstream side. The solid phase ratio is greater with a background flow field than without one. The higher the flow velocity is, the more developed the dendrites on the upstream side, the faster the dendrites grow, and the higher the dendrite tip growth rate. The dendrites on the backflow side have a lower flow rate and a lower degree of supercooling than those on the upstream side, which inhibits the solidification process, the growth rate is slow, and the dendrites are underdeveloped.更多还原