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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
IMPLICIT LARGE EDDY SIMULATIONS OF CONSTRICTED AND OPEN CHANNEL TURBULENT FLOWS USING A HIGH ORDER METHOD
Submission Author:
Eron Tiago Viana Dauricio , SP , Brazil
Co-Authors:
Eron Tiago Viana Dauricio, João Luiz F. Azevedo
Presenter: Eron Tiago Viana Dauricio
doi://10.26678/ABCM.ENCIT2020.CIT20-0065
Abstract
While Large Eddy Simulations (LES) are receiving ever more attention as the computational power rapidly increases throughout the decades, the computational costs of such calculations are still relatively high, especially for wall-bounded, high Reynolds number flows. Implicit LES (ILES) is an approach that aims at reducing the computational cost and implementation complexity, in which the explicit modeling of the subgrid scales is dropped. Hence, the artificial dissipation of the numerical method is responsible for taking into account the dissipative nature of the small scales in the overall turbulent flow, as done by the usual functional subgrid scale models. The objective of this work is to assess the applicability of the ILES approach to turbulent wall-bounded flows when using the high order discontinuous Galerkin method. Two test cases are simulated with three different configurations in order to carry out such assessment. Mean velocity profiles, Reynolds stresses and engineering coefficients are extracted and compared with reference data. The results indicate that the current approach is capable of predicting such quantities reasonably well, and certainly within engineering accuracy.
Keywords
Implicit LES, Wall-Bounded Flows, Discontinuous Galerkin Method, High-order Method
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