Resolution estimates for simple one-dimensional flames

Resolution estimates for simple one-dimensional flames
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简单一维火焰的分辨率估计

DOI:
10.1080/13647830.2017.1324641
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发表时间:
2017
影响因子:
1.3
通讯作者:
Prosser R
Prosser R
中科院分区:
工程技术4区
文献类型:
--
作者:
Prosser R

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火焰结构的精确分辨对于直接数值模拟反应流动是至关重要的。虽然网格分辨率估计很容易用于冷流,但预混火焰似乎得到的关注相对较少。本文分析了一种具有中至高泽尔多维奇数(β)的单步化学特征的预混火焰,并利用其结构提供了足够网格分辨率的估计。发现火焰临界区域表现出弱的逆Zel'dovitch数依赖关系,并且基于火焰厚度的启发式分辨率估计方法随着β→∞变得相对不那么有意义。给出了二阶和四阶有限差分格式的分辨率估计。
The accurate resolution of flame structure is critically important to the direct numerical simulation of reacting flows. While grid-resolution estimates are readily available for cold flows, premixed flames appear to have received relatively little attention. In this paper, a premixed flame characterised by single-step chemistry at moderate-to-high Zel'dovitch numbers (β) is analysed, and its structure is used to provide estimates for sufficient grid resolution. It is found that the critical region of the flame exhibits a weak inverse Zel'dovitch number dependence, and that heuristic methods of resolution estimation based on flame thickness grow relatively less meaningful as β → ∞. Resolution estimates for second- and fourth-order finite-difference schemes are provided.
DOI: --
发表时间: 1993
期刊:
影响因子: --
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DOI: --
发表时间: 1984
期刊:
影响因子: --
作者:
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DOI: --
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发表时间: 1988
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