Abstract
The paper presents the results of numerical simulations of an incompressible flow in a converging–diverging channel performed with Large Eddy Simulation (LES) combined with the immersed boundary (IB) method. The computations are carried out using a high-order code with the spatial discretization based on the compact difference method for half-staggered meshes. IB method is implemented in the so-called direct forcing approach with a second-order interpolation near the boundaries. Two relatively new subgrid models are used in the simulations, i.e. the model proposed by Vreman, Phys Fluids 16:3670–3681, 2004, [1] and the model proposed by Nicoud et al., Phys Fluids 23:193–202, 2011, [2]. It is demonstrated that both of them perform well and there is no evident advantage for either of them. The mean and r.m.s velocity profiles agree with exemplary DNS data.
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Acknowledgments
Authors thank to Prof. W. Elsner for fruitful discussion. These research were supported by Polish National Science Centre under grant no. DEC-2012/07/B/ST8/03791. The computations were performed using PL-Grid Infrastructure (Poland).
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Ksiezyk, M., Tyliszczak, A. (2016). LES of a Converging–Diverging Channel Performed with the Immersed Boundary Method and a High-Order Compact Discretization. In: Stanislas, M., Jimenez, J., Marusic, I. (eds) Progress in Wall Turbulence 2. ERCOFTAC Series, vol 23. Springer, Cham. https://doi.org/10.1007/978-3-319-20388-1_17
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DOI: https://doi.org/10.1007/978-3-319-20388-1_17
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