We present a successful deployment of high-fidelity Large-Eddy Simulation (LES) technologies based on spectral/hp element methods to industrial flow problems, which are characterized by high Reynolds numbers and complex geometries. In particular, we describe the numerical methods, software development and steps that were required to perform the implicit LES of a real automotive car, namely the Elemental Rp1 model. To the best of the authors' knowledge, this simulation represents the first fifth-order accurate transient LES of an entire real car geometry. Moreover, this constitutes a key milestone towards considerably expanding the computational design envelope currently allowed in industry, where steady-state modelling remains the standard. To this end, a number of novel developments had to be made in order to overcome obstacles in mesh generation and solver technology to achieve this simulation, which we detail in this paper. The main objective is to present to the industrial and applied mathematics community, a viable pathway to translate academic developments into industrial tools, that can substantially advance the analysis and design capabilities of high-end engineering stakeholders. The novel developments and results were achieved using the academic-driven open-source framework Nektar++.
翻译:我们根据光谱/光谱要素要素方法,成功地将高不全度大型模拟(LES)技术应用于工业流动问题,其特点是Reynolds数字和复杂的几何特征高,我们特别描述了数字方法、软件开发和实施真正汽车汽车隐含的LES所需步骤,即Elemental Rp1模型。据作者所知,这一模拟是整个实际汽车几何学的第五级准确瞬时性LES。此外,这是一个重要里程碑,可大大扩展目前工业中允许的计算设计封套,在工业中稳定状态建模仍为标准。为此,必须进行一些新的发展,以克服制造网状和求解决器技术中的障碍,实现模拟。我们在本文中详述了这些新发展。主要目标是向工业和应用数学界介绍,这是将学术发展转化为工业工具的可行途径,可以大大推进高端工程利益攸关方的分析和设计能力。新的发展和成果是利用学术驱动的开放源框架Nektar++。