...献中的研究表明,一阶差分格式 如向前差分、向后差分或者中心差分格式数值稳定, 但是容易出现数值振荡(numerical oscillation)和粒 度函数为负数的情况,二阶差分格式虽然避免了数 值振荡但是却容易出现数值扩散,导致结果的偏差 比较大。
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In this paper, an optimal method to control numerical oscillation in streamlne direction is proposed, which exhibits better properties in preclusion of numerical oscillation and crosswind effects in comparison with the classical Scharfetter-Gummel method and SUPG method.
本文提出了流线方向控制数值振荡的最优方法,与传统的Scharfetter-Gummel方法和SUPG方法相比,本方法在消除数值振荡和侧风效应方面具备更好的特性。
参考来源 - 流线方向控制数值振荡的理论与最优方法 in C·2,447,543篇论文数据,部分数据来源于NoteExpress
对数值振荡的抑制、通用ICCG指针存储寻址等相关理论进行了研究。
Relevant theories as suppression of numerical oscillating, general ICCG pointer memory addressing, etc. are studied.
为了解决数值振荡问题,采用了局部网格细化、动态时间步长和集中热容矩阵等方法。
The methods of local mesh refined, dynamic time step and lumped heat capacity matrix were introduced to resolve the numerical oscillation problem.
该算法的优点是特别适用于求解变系数的对流占优扩散方程,能更有效地消除数值振荡现象。
The advantage of this scheme is very adaptable to obtain the solution of the equations with variable coefficient and can eliminate the numerical oscillations more efficiently.
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