Abstract
Mixing and combustion of buoyant reacting flows from rectangular, square and round sources are investigated using Direct Numerical Simulation (DNS). The full Navier-Stokes equations and the finite-rate Arrhenius-type chemical reactions are simulated by high-order methods. Axis switching is observed in the rectangular plume of aspect ratio 3 but not in the case of aspect ratio 2. A new explanation of the aspect ratio effect is proposed, which is confirmed by the higher level of vorticity and entrainment rate along the major axis as compared with those along the minor axis. Finally, the DNS data are used to validate two newly constructed subgrid-scale (SGS) models for the highly non-linear radiative heat transfer source.
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© 2004 Springer Science+Business Media Dordrecht
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Luo, K.H. (2004). Enhancement of Mixing and Combustion in Buoyant Non-Circular Plumes. In: Friedrich, R., Geurts, B.J., Métais, O. (eds) Direct and Large-Eddy Simulation V. ERCOFTAC Series, vol 9. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-2313-2_41
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DOI: https://doi.org/10.1007/978-1-4020-2313-2_41
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-6575-9
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