文章基本信息

标题：Evaluation of a Near-Wall-Modeled Large Eddy Lattice Boltzmann Method for the Analysis of Complex Flows Relevant to IC Engines
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作者：Marc Haussmann ; Florian Ries ; Jonathan B. Jeppener-Haltenhoff 等
期刊名称：Computation
电子版ISSN：2079-3197
出版年度：2020
卷号：8
期号：2
页码：43-74
DOI：10.3390/computation8020043
出版社：MDPI Publishing
摘要：In this paper, we compare the capabilities of two open source near-wall-modeled large eddy simulation (NWM-LES) approaches regarding prediction accuracy, computational costs and ease of use to predict complex turbulent flows relevant to internal combustion (IC) engines. The applied open source tools are the commonly used OpenFOAM, based on the finite volume method (FVM), and OpenLB, an implementation of the lattice Boltzmann method (LBM). The near-wall region is modeled by the Musker equation coupled to a van Driest damped Smagorinsky-Lilly sub-grid scale model to decrease the required mesh resolution. The results of both frameworks are compared to a stationary engine flow bench experiment by means of particle image velocimetry (PIV). The validation covers a detailed error analysis using time-averaged and root mean square (RMS) velocity fields. Grid studies are performed to examine the performance of the two solvers. In addition, the differences in the processes of grid generation are highlighted. The performance results show that the OpenLB approach is on average 32 times faster than the OpenFOAM implementation for the tested configurations. This indicates the potential of LBM for the simulation of IC engine-relevant complex turbulent flows using NWM-LES with computationally economic costs.
关键词：turbulent flow; large-eddy simulation; wall function; IC engine; OpenLB; OpenFOAM; particle image velocimetry turbulent flow ; large-eddy simulation ; wall function ; IC engine ; OpenLB ; OpenFOAM ; particle image velocimetry