Adaptive software for high-fidelity simulations of multi-phase turbulent reacting flows

用于多相湍流反应流高保真模拟的自适应软件

• 批准号: EP/P022286/1
• 负责人: Nilanjan Chakraborty
• 金额: $ 60.61万
• 依托单位: Newcastle University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FP022286%2F1
• 关键词: Adaptive; software; fidelity; simulations; multi

This project focuses on the development, validation and documentation of a next-generation fully parallelised computa-tional fluid dynamics (CFD) code called HAMISH based on adaptive mesh refinement (AMR) which will enable high-fidelity Direct Numerical Simulations (DNS) of advanced turbulent reacting flows such as flame-wall interaction, localised ignition, and droplet combustion including atomisation processes. Such simulations cannot be achieved at present without limiting simplifications due to their prohibitive computational cost. AMR for large-scale highly-parallel simulations of compressible turbulent reacting flows is a significant new functionality which will offer major benefits in terms of computational economy for problems involving thin fluid-mechanical structures, e.g. resolution of both the flame and the boundary layer in flame-wall interaction, droplet surfaces in atomisation in spray combustion, shock waves in localised forced ignition, etc. Such structures have either been ignored or simplified severely in previous work due to the prohibitive computational cost of fixed global meshes, thus limiting the usefulness of the simulations. Hence AMR will offer a step-change in capability for the computational analysis of turbulent reacting flows, and will provide data with the degree of detailed physical information which is not currently available from simulations using existing CFD codes. The proposed software will be validated with respect to the results obtained from the well-proven uniform-mesh DNS code SENGA2, which has already been ported to ARCHER and is currently widely used by members of the UK Consortium on Turbulent Reacting Flows (UKCTRF). The newly developed code, HAMISH, will not only be ported to ARCHER, but also be prepared for architectures supporting accelerators thanks to OpenMP 4.5, which will support OpenACC, targeting a POWER8 cluster. As a part of this project, a detailed user guide will be produced at each new release of the code. This user guide will be made available on a website for public download along with the open-source version of the code and the associated documentation on code validation and user tutorials.

This project focuses on the development, validation and documentation of a next-generation fully parallelised computa-tional fluid dynamics (CFD) code called HAMISH based on adaptive mesh refinement (AMR) which will enable high-fidelity Direct Numerical Simulations (DNS) of advanced turbulent reacting flows such as flame-wall interaction, localised ignition, and droplet combustion including atomisation processes.目前无法在没有限制简化的计算成本的情况下实现此类模拟。用于可压缩湍流反应流的大规模高度平行模拟的AMR是一个重要的新功能，它将在计算经济方面为涉及薄液体机械结构的问题提供了重大好处，例如在火焰壁相互作用中分辨出火焰和边界层，喷雾燃烧中雾化的液滴表面，局部强制点火的冲击波等。由于固定全局网格的过度计算成本，在先前的工作中忽略了这些结构，因此在先前的工作中被严重地简化了。因此，AMR将提供对动荡反应流的计算分析的逐步变化，并将提供具有详细物理信息程度的数据，目前使用现有CFD代码从模拟中获得该数据。该软件将在已验证的均匀统一网状DNS Code Senga2获得的结果方面进行验证，该代码已经移植到Archer，目前已被英国在湍流反应流（UKCTRF）的联盟成员广泛使用。新开发的代码Hamish不仅将移植到Archer，而且还可以为支持加速器的体系结构做好准备，这要归功于OpenMP 4.5，该OpenMP 4.5将支持OpenACC，以Power8群集为目标。作为该项目的一部分，将在代码的每个新版本中生成详细的用户指南。该用户指南将在网站上提供公开下载，以及代码的开源版本以及有关代码验证和用​​户教程的关联文档。

项目成果

Three dimensional measurements of surface areas and burning velocities of turbulent spherical flames

• DOI: 10.1016/j.combustflame.2021.111586
• 发表时间: 2021-11
• 期刊: Combustion and Flame
• 影响因子: 4.4
• 作者: P. Ahmed;B. Thorne;M. Lawes;S. Hochgreb;G. Nivarti;R. Cant

Insights into the Bending Effect in Premixed Turbulent Combustion Using the Flame Surface Density Transport

使用火焰表面密度传输深入了解预混湍流燃烧中的弯曲效应

• DOI: 10.1080/00102202.2019.1577241
• 发表时间: 2019
• 期刊: Combustion Science and Technology
• 影响因子: 1.9
• 作者: Ahmed U

Influence of thermal wall boundary condition on scalar statistics during flame-wall interaction of premixed combustion in turbulent boundary layers

• DOI: 10.1016/j.ijheatfluidflow.2021.108881
• 发表时间: 2021-11-12
• 期刊: INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW
• 影响因子: 2.6
• 作者: Ahmed, Umair;Chakraborty, Nilanjan;Klein, Markus
• 通讯作者: Klein, Markus

Influence of Flow Configuration and Thermal Wall Boundary Conditions on Turbulence During Premixed Flame-Wall Interaction within Low Reynolds Number Boundary Layers

低雷诺数边界层内预混火焰壁相互作用过程中流动形态和热壁边界条件对湍流的影响

• DOI: 10.1007/s10494-023-00437-y
• 发表时间: 2023
• 期刊: Flow, Turbulence and Combustion
• 作者: Ahmed U

Scalar Gradient and Strain Rate Statistics in Oblique Premixed Flame-Wall Interaction Within Turbulent Channel Flows

• DOI: 10.1007/s10494-020-00169-3
• 发表时间: 2020-06-15
• 期刊: FLOW TURBULENCE AND COMBUSTION
• 影响因子: 2.4
• 作者: Ahmed, Umair;Chakraborty, Nilanjan;Klein, Markus
• 通讯作者: Klein, Markus