Instability of a dusty vortex
Instability of a dusty vortex
复制标题
尘埃涡旋的不稳定性
DOI:
10.1017/jfm.2022.687
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发表时间:
2022
影响因子:
3.7
通讯作者:
Kasbaoui, M. Houssem
中科院分区:
文献类型:
--
作者:
Shuai, Shuai;Jeswin Dhas, Darish;Roy, Anubhab;Kasbaoui, M. Houssem
We investigate the effect of inertial particles dispersed in a circular patch of finite radius on the stability of a two-dimensional Rankine vortex in semi-dilute dusty flows. Unlike the particle-free case where no unstable modes exist, we show that the feedback force from the particles triggers a novel instability. The mechanisms driving the instability are characterized using linear stability analysis for weakly inertial particles and further validated against Eulerian–Lagrangian simulations. We show that the particle-laden vortex is always unstable if the mass loading increases. When particles are inertial, modes that fall below the critical mass loading become unstable, whereas modes above it remain unstable but with lower growth rates compared with the non-inertial case. Comparison with Eulerian–Lagrangian simulations shows that growth rates computed from simulations match well the theoretical predictions. Past the linear stage, we observe the emergence of high-wavenumber modes that turn into spiralling arms of concentrated particles emanating out of the core, while regions of particle-free flow are sucked inward. The vorticity field displays a similar pattern which leads to the breakdown of the initial Rankine structure. This novel instability for a dusty vortex highlights how the feedback force from the disperse phase can induce the breakdown of an otherwise resilient vortical structure.
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DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
J. Marshall
通讯作者:
J. Marshall
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
Rodger A. Brown;Bradley A. Flickinger;Eddie Forren;David M. Schultz;D. Sirmans;P. Spencer;Vincent T. Wood;C. Ziegler
通讯作者:
C. Ziegler
影响因子:
3.7
作者:
Y. Fung;U. Kurzweg
通讯作者:
U. Kurzweg
DOI:
10.1098/rsta.1979.0003
发表时间:
1979
期刊:
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences
影响因子:
--
作者:
通讯作者:
--
DOI:
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发表时间:
1994
期刊:
影响因子:
--
作者:
O. Druzhinin
通讯作者:
O. Druzhinin