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Evaluation of a near-wall-modeled large eddy lattice boltzmann method for the analysis of complex flows relevant to IC engines

Haussmann, M.; Ries, F.; Jeppener-Haltenhoff, J. B.; Li, Y.; Schmidt, M.; Welch, C.; Illmann, L.; Böhm, B.; Nirschl, H.; Krause, M. J.; Sadiki, A.

Abstract:
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. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000120762
Veröffentlicht am 11.07.2020
Originalveröffentlichung
DOI: 10.3390/COMPUTATION8020043
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mechanische Verfahrenstechnik und Mechanik (MVM)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2079-3197
KITopen-ID: 1000120762
Erschienen in Computation
Band 8
Heft 2
Seiten Art. Nr.: 43
Vorab online veröffentlicht am 06.05.2020
Schlagwörter turbulent flow, large-eddy simulation, wall function, IC engine, OpenLB, OpenFOAM, particle image velocimetry
Nachgewiesen in Scopus
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