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.

该项目重点开发、验证和记录名为 HAMISH 的下一代完全并行计算流体动力学 (CFD) 代码，该代码基于自适应网格细化 (AMR)，该代码将实现高级湍流反应流的高保真直接数值模拟 (DNS)，例如火焰壁相互作用、局部点火和包括雾化过程在内的液滴燃烧。由于计算成本过高，目前无法在不限制简化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并行模拟的 AMR 是一项重要的新功能，它将为涉及薄流体机械结构的问题（例如流体机械结构）提供计算经济性方面的重大优势。火焰壁相互作用中火焰和边界层的分辨率、喷雾燃烧中雾化中的液滴表面、局部强制点火中的冲击波等。由于固定全局网格的计算成本过高，这些结构在以前的工作中要么被忽略，要么被严重简化，从而限制了模拟的有用性。因此，AMR 将为湍流反应流的计算分析能力提供阶跃变化，并将提供具有详细物理信息程度的数据，而这些信息目前无法从使用现有 CFD 代码的模拟中获得。拟议的软件将根据经过充分验证的均匀网格 DNS 代码 SENGA2 获得的结果进行验证，该代码已移植到 ARCHER，目前被英国湍流反应流联盟 (UKCTRF) 的成员广泛使用。新开发的代码 HAMISH 不仅将移植到 ARCHER，而且还将为支持加速器的架构做好准备，这要归功于 OpenMP 4.5，它将支持 OpenACC，针对 POWER8 集群。作为该项目的一部分，每个新版本的代码都会生成详细的用户指南。该用户指南将与代码的开源版本以及有关代码验证和用​​户教程的相关文档一起在网站上供公众下载。

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

Flame self-interaction during turbulent boundary layer flashback of hydrogen-rich premixed combustion

富氢预混燃烧湍流边界层回火过程中火焰自相互作用

• DOI: 10.1103/physrevfluids.8.023202
• 发表时间: 2023
• 期刊: Physical Review Fluids
• 影响因子: 2.7
• 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

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

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