By developing a multilevel thermosolutal phase-field lattice-Boltzmann method, we achieve three-dimensional phase-field simulations of dendrite growth with realistic Lewis number ($\mathit{Le}\sim {10}^4$) in equivalently over 10⁸ uniform meshes. In addition to parallel computing and mesh adaptivity, the high-performance computing algorithm allows the time step enlarged by 2–3 orders of magnitude in an explicit scheme. Dependence of specific interface area, an integral measure of solidification microstructure, on time t and solid fraction $f_s$ is revisited including the $t^{1/3}$ coarsening law and $f_s^p{(1-f_s)}^q$ growth law (p and q are constants). The effect of latent heat on the evolution of specific interface area is evaluated, and such effect is equivalent to isothermal case or frozen-temperature approximation if Le exceeds 5000.

通过开发多级热溶相场晶格-玻尔兹曼方法，我们实现了具有真实路易斯数的枝晶生长的三维相场模拟（$\mathit{乐}～{10}^4$) 等价于 10 ^{8 个}均匀网格。除了并行计算和网格自适应外，高性能计算算法允许在显式方案中将时间步长扩大 2-3 个数量级。特定界面面积的依赖性，凝固微观结构的整体测量，时间t和固体分数$F_{秒}$ 被重新审视，包括 ${吨}^{1/3}$ 粗化定律和 $F_{秒}^{磷}{(1-F_{秒})}^q$增长规律（p和q是常数）。评估了潜热对特定界面面积演变的影响，如果Le超过 5000 ，这种影响等效于等温情况或冻结温度近似。