Industry-Relevant Implicit Large-Eddy Simulation of a High-Performance Road Car via Spectral/hp Element Methods

TL;DR

This paper demonstrates the first fifth-order accurate implicit LES of an entire real automotive car geometry using spectral/hp element methods, advancing industrial high-fidelity flow simulations.

Contribution

It introduces novel numerical and software developments enabling high-order LES of complex industrial geometries, bridging academic methods and industrial applications.

Findings

First fifth-order accurate transient LES of a real car geometry

Successful deployment of spectral/hp element methods in industry

Enhanced computational design capabilities for automotive engineering

Abstract

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++.