A common approach to the computation of coarse-scale steady states and to consistent initialization on a slow manifold

A common approach to the computation of coarse-scale steady states and to consistent initialization on a slow manifold
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计算粗尺度稳态和在慢流形上进行一致初始化的常用方法

DOI:
10.1016/j.compchemeng.2010.12.002
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发表时间:
2011
期刊:
Comput. Chem. Eng.
影响因子:
--
通讯作者:
I. Kevrekidis
I. Kevrekidis
中科院分区:
--
文献类型:
--
作者:
C. Vandekerckhove;Benjamin Sonday;A. Makeev;D. Roose;I. Kevrekidis

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我们提出了一个简单的技术,用于计算粗尺度的稳态动力系统的时间尺度分离的形式的“包装器”周围的细尺度模拟器。我们讨论了这种方法如何解决现有方法遇到的某些问题,并通过计算格子玻尔兹曼精细尺度代码的粗尺度稳态来说明其用途。有趣的是,在相同的多时间尺度问题的背景下,该方法可以稍微修改,以提供初始条件的慢流形与规定的粗尺度观测。该方法是基于适当设计的短脉冲的精细尺度模拟器,其结果被用来跟踪粗感兴趣的变量,方程的自由框架的核心组成部分的变化。
We present a simple technique for the computation of coarse-scale steady states of dynamical systems with time scale separation in the form of a “wrapper” around a fine-scale simulator. We discuss how this approach alleviates certain problems encountered by comparable existing approaches, and illustrate its use by computing coarse-scale steady states of a lattice Boltzmann fine scale code. Interestingly, in the same context of multiple time scale problems, the approach can be slightly modified to provide initial conditions on the slow manifold with prescribed coarse-scale observables. The approach is based on appropriately designed short bursts of the fine-scale simulator whose results are used to track changes in the coarse variables of interest, a core component of the equation-free framework.
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DOI: --
发表时间: 2005
期刊: 日本科学教育学会年会論文集 第29号
影响因子: --
作者:
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通讯作者: 猿田祐嗣