Abstract
Three dimensional variable density jets at low Mach number conditions are analyzed by means of Large Eddy Simulations. The LES equations were derived starting from a low Mach number approximation of the continuity, Navier- Stokes and energy equations. The numerical method is based on the high-order compact/Fourier pseudospectral schemes. The superposition of axial and flapping (helical) periodic disturbances at the jet outlet, forced the jet to bifurcate at certain excitation frequency. The LES calculations for non-isothermal case revealed that, for the case when the jet density is lower in comparison with the ambient fluid, the excitation frequency needed for bifurcation is higher than for the isothermal jet.
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Tyliszczak, A., Boguslawski, A. (2007). LES of Variable Density Bifurcating Jets. In: Kassinos, S.C., Langer, C.A., Iaccarino, G., Moin, P. (eds) Complex Effects in Large Eddy Simulations. Lecture Notes in Computational Science and Engineering, vol 56. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-34234-2_20
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DOI: https://doi.org/10.1007/978-3-540-34234-2_20
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