...
首页> 外文期刊>Computer Methods in Applied Mechanics and Engineering >Enforcement of constraints and maximum principles in the variational multiscale method
【24h】

Enforcement of constraints and maximum principles in the variational multiscale method

机译:变分多尺度方法中约束和最大原则的实施

获取原文
获取原文并翻译 | 示例
           

摘要

We present a new theoretical framework for the enforcement of constraints in variational multiscale (VMS) analysis. The theory is first presented in an abstract operator format and subsequently specialized for the steady advection-diffusion equation. The approach borrows heavily from results in constrained and convex optimization. An exact expression for the fine-scales is derived in terms of variational derivatives of the constraints, Lagrange multipliers, and a fine-scale Green's function. The methodology described enables the development of numerical methods which satisfy predefined attributes. A practical and effective procedure for solving the steady advection-diffusion equation is presented based on a VMS-inspired stabilized method, weakly enforced Dirichlet boundary conditions, and enforcement of a maximum principle and conservation constraint.
机译:我们提出了一个新的理论框架,用于实施变分多尺度(VMS)分析中的约束。该理论首先以抽象算子格式提出,随后专门研究稳态对流扩散方程。该方法大量借鉴了约束优化和凸优化的结果。根据约束的变分导数,拉格朗日乘数和精细格林函数,可以得出精细尺度的精确表达式。所描述的方法使得能够开发满足预定属性的数值方法。提出了一种实用有效的方法来求解稳态对流扩散方程,该方法基于VMS启发式的稳定方法,弱强制Dirichlet边界条件以及最大原则和守恒约束的强制执行。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号