机构地区: 中国科学院大气物理研究所
出 处: 《计算物理》 1996年第4期403-409,共7页
摘 要: 大气海洋问题数值计算的重要特征之一是需要作长时间的数值积分,因此在方程差分离散化后如何保持原问题的物理特性成为一个很关键的问题。从传统的“半拉格朗日法”和显式完全能量守恒差分法中吸取“营养”。 One of important features in the numerical modelling of motions of atmosphere or ocean consists in the long period prediction.A key point in such simulations is to maintain the intrinsic physical features of the original problem and to preveant the distortion due to the accumulation of numerical errors.This paper takes into account the traditional Semi Lagrangian integration scheme.A scheme is constructed so as to keep the conservation of total energy and enlarge the time step to one decade times.Besides it is an explicit scheme,it avoids complex matrices.Several preliminary numerical tests show good perspective of this scheme.