机构地区: 北京科技大学应用科学学院
出 处: 《北京工商大学学报(自然科学版)》 2004年第5期59-61,66,共4页
摘 要: 利用傅里叶级数展开,将稳态晶体生长的浓度控制方程转化为一阶常微分方程组.利用对于一阶常微分方程组性质的讨论,得到了稳态晶体生长控制方程的精确解.理论结果可用于揭示稳态胞晶体周期性增长的本质特性. A class of partial differential equations (PDE) which describe two-dimension steady state crystal growth for concentration were studied. By using Fourier series expansion method, we can change the PDE into a set of ordinary differential equations (ODEs). Making use of properties of ODEs, the exact solution of the PDE was obtained. The result shows that the concentration in the solid-liquid interface is exponentially damped oscillation.