摘要
两油品间的混油过程是二维对流占优的扩散过程,常用的数值方法存在较大的数值扩散或较大的非物理性振荡现象。将特征线方法和有限差分法相结合,提出了一种求解对流占优扩散方程新的数值解法——双时间分裂法。该方法具有计算速度快、存储量小且无条件稳定等优点。应用该算法对成品油顺序输送中的混油进行了分析,对对流占优扩散方程进行了求解,数值计算结果与实际操作经验相符,合理地解释了混油的形成与发展问题。
The process of contamination between batches is a process of two-dimension convection-diffusion.The bigger numerical dispersion and non-physics surge phenomena are existed in commonly used numerical methods.The double-time splitting method,which is a solving method of diffusion equation that mainly be controlled by convection,is proposed by the combination of characteristics method and finite difference method.The method,which is faster,small storage and unconditioned stabilization,is applied to solve the convection-diffusion equation and analyze the contamination in batch transportation of oil products.The results of numerical computation conform to engineering and explain the forming and developing of contamination very well.Thus,it proves that the method is right.
出处
《油气储运》
CAS
北大核心
2008年第11期13-16,共4页
Oil & Gas Storage and Transportation
基金
中石化集团公司资助项目(X504007)
关键词
成品油
顺序输送
混油
分析
时间分裂法
应用
Subject Headings:oil products
batch transportation
oil contamination
analysis
time splitting method
application
