@inproceedings{4a54fa50c9084b8caf0ab465986f486f,
title = "Secondary instability in variable-density round jets",
abstract = "Side jet formation in variable-density round jets is investigated by means of direct numerical simulation (DNS) and linear stability analysis. From DNS, it is observed that a light jet with density ratio S = ρ0/ ρj = 4 supports sustained side jets which eject fluid from the center of the jet in a star-shaped pattern. These side jets persist over an axial distance of approximately 5 jet diameters before the jet transitions to turbulence, and do not precess around the jet. It is conjectured that this behavior can be explained by a change in the local properties of the secondary instability from convective to absolute in nature. This hypothesis is tested by examining the spatio-temporal development of the wavepacket resulting from a small impulse, taken about a non-diffusing periodic base state corresponding to the saturated primary instability.",
author = "Nichols, \{Joseph W.\} and Chomaz, \{Jean Marc\} and Schmid, \{Peter J.\}",
year = "2007",
month = jan,
day = "1",
doi = "10.1007/978-3-540-72604-3\_9",
language = "English",
isbn = "9783540726036",
series = "Advances in Turbulence XI - Proceedings of the 11th EUROMECH European Turbulence Conference",
publisher = "Springer Verlag",
pages = "32--34",
booktitle = "Advances in Turbulence XI - Proceedings of the 11th EUROMECH European Turbulence Conference",
note = "11th EUROMECH European Turbulence Conference, ETC11 ; Conference date: 25-06-2007 Through 28-06-2007",
}