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Quality of LES predictions of isothermal and hot round jet. (English) Zbl 1345.76073

Meyers, Johan (ed.) et al., Quality and reliability of large eddy simulations. Proceedings of the 1st meeting on ‘Quality and reliability of large-eddy simulations’ (QLES 07), Leuven, Belgium, October 22–24, 2007. Dordrecht: Springer (ISBN 978-1-4020-8577-2/hbk). ERCOFTAC Series 12, 259-270 (2008).
Summary: The paper presents results of LES computations performed for isothermal and non-isothermal variable density jets using high order numerical code. According to the experimental data and linear stability theory the range of the density ratios between jet and the ambient fluids considered in this work encloses the regimes of absolute and convective type of instability. Much attention is paid to the quality of the solutions depending on the mesh resolution and turbulence intensity imposed at the inlet velocity profile. The differences between the solutions obtained using different (advective/conservative) form of the Navier-Stokes equations are also mentioned.
For the entire collection see [Zbl 1143.76004].

MSC:

76F65 Direct numerical and large eddy simulation of turbulence
76F10 Shear flows and turbulence
80M20 Finite difference methods applied to problems in thermodynamics and heat transfer
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