Abstract
A recent kinematic sensitive subgrid length scale, \(\varDelta _{lsq}\), initially developed for LES applications, is now considered for DES. Even though it is presented as a subgrid length scale, instead of a grey area mitigation (GAM) technique, this initial study shows how it could also be a good and natural approach for addressing this well-known DES shortcoming. In this paper, the \(\varDelta _{lsq}\) has been compared with a well-known kinematic sensitive length scale, \({\tilde{\varDelta }_{\omega }}\). It includes a mesh resilience and a shear layer delay study with a Decaying Homogeneous Isotropic Turbulence configuration and two Backward Facing Step configurations, respectively. Encouraging results have been obtained, indicating \(\varDelta _{lsq}\) as a subgrid length scale to be considered.
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Acknowledgements
This work has been financially supported by the Ministerio de Economía y Competitividad, Spain (No. ENE2017-88697-R). A.P.V. is supported by a FI-DGR 2016 predoctoral contract (No. 2018FI_B2_00072) financed by Generalitat de Catalunya, Spain. F.X.T. is supported by a Ramón y Cajal postdoctoral Contract (No. RYC-2012-11996) financed by the Ministerio de Economía y Competitividad, Spain.
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Pont-Vílchez, A., Trias, F.X., Revell, A., Oliva, A. (2020). Assessment and Comparison of a Recent Kinematic Sensitive Subgrid Length Scale in Hybrid RANS-LES. In: Hoarau, Y., Peng, SH., Schwamborn, D., Revell, A., Mockett, C. (eds) Progress in Hybrid RANS-LES Modelling . Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 143. Springer, Cham. https://doi.org/10.1007/978-3-030-27607-2_7
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