Abstract
The role of subgrid scale (SGS) viscosity is investigated in LES and VMS-LES simulations of the flow around a circular cylinder at Re=20000 on unstructured grids. The separation between the largest and the smallest resolved scales in the VMS formulation is obtained through a variational projection operator and finite-volume cell agglomeration. Two different non-dynamic eddy-viscosity SGS models are used both in classical LES and in VMS-LES. The sensitivity of the results to different parameters, such as the value of the SGS model input coefficient or the agglomeration level and to numerical viscosity in VMS-LES, is also addressed. Finally, a possible indicator of quality of the LES and VMS-LES predictions is examined.
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Ouvrard, H., Salvetti, M.V., Koobus, B., Dervieux, A. (2011). Quality of classical and variational multiscale LES simulations of the flow around a circular cylinder. In: Salvetti, M., Geurts, B., Meyers, J., Sagaut, P. (eds) Quality and Reliability of Large-Eddy Simulations II. ERCOFTAC Series, vol 16. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-0231-8_12
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DOI: https://doi.org/10.1007/978-94-007-0231-8_12
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-007-0230-1
Online ISBN: 978-94-007-0231-8
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