Detailed chemistry simulations of turbulent reacting flows involving combustion of hydrocarbons can easily exceed the available computational resources, depending on the dimensions of the chemical system. Previous work of the authors showed how the combination of the Eulerian Stochastic Fields (ESF) model with tabulated chemistry based on 2-dimensional Reaction-Diffusion Manifolds (REDIM) provided a significant computational speed-up, compared to the finite rate ESF solver. In this work, the behaviour for flame F, featuring a strong degree of extinction, is further investigated. A comparison is performed for 2D and 3D databases, both using simplified and detailed transport, where the scalar dissipation rate is included as the third table parameter. The results show that the upstream sections are well captured by the REDIM built for detailed transport, while the downstream sections are better captured by the simplified transport database. While a 3D-REDIM based on simplified transport seems to be necessary to capture the extinction events, a 2D-REDIM with differential diffusion already provides satisfactory results. Overall, the use of a 3D-REDIM with differential diffusion better describes the global behaviour of flame F.

涉及碳氢化合物燃烧的湍流反应流的详细化学模拟很容易超过可用的计算资源，具体取决于化学系统的尺寸。作者之前的工作表明，与有限速率 ESF 求解器相比，欧拉随机场 (ESF) 模型与基于二维反应-扩散流形 (REDIM) 的制表化学相结合如何显着提高计算速度。在这项工作中，进一步研究了具有强消光度的火焰 F 的行为。使用简化和详细传输对 2D 和 3D 数据库进行比较，其中标量耗散率作为第三个表参数包含在内。结果表明，为详细运输而构建的 REDIM 很好地捕获了上游路段，而简化的运输数据库更好地捕获了下游路段。虽然基于简化传输的 3D-REDIM 似乎是捕捉灭绝事件所必需的，但具有差分扩散的 2D-REDIM 已经提供了令人满意的结果。总体而言，使用具有差分扩散的 3D-REDIM 更好地描述了火焰 F 的全局行为。