On the drag of turbulent vortex rings
On the drag of turbulent vortex rings
复制标题
论湍流涡环的阻力
DOI：
10.1017/jfm.2012.322
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发表时间：
2012
影响因子：
3.7
通讯作者：
Gan L
中科院分区：
文献类型：
--
作者：
Gan L
In this paper the pressure field during the early development of turbulent vortex rings at two Reynolds numbers is determined using temporally resolved two-dimensional and stereoscopic particle image velocimetry (PIV). The pressure gradient terms are obtained by solving the incompressible Euler equation so that the drag coefficients of the vortex rings can be evaluated. Maxworthy (J. Fluid Mech., vol. 64, 1974, pp. 227–239) and Glezer & Coles (J. Fluid Mech., vol. 211, 1990, pp. 243–283) each developed models to describe the long-term physics of turbulent vortex rings: the former developed a semi-empirical model which permits loss of impulse via the shedding of vorticity into the wake whereas the latter developed a similarity model based on invariance of the hydrodynamic impulse. Maxworthy’s model implies that a significant correction to the similarity solution is required to account for the drag on the vortex ring bubble. We show that during the early development of the turbulent vortex rings the drag is very small and the similarity scaling can basically be retained.
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影响因子：
2.4
作者：
L. Gan;T. Nickels;J. Dawson
通讯作者：
J. Dawson
影响因子：
3.7
作者：
GLEZER, A;COLES, D
通讯作者：
COLES, D
DOI：
--
发表时间：
1970
期刊：
影响因子：
--
作者：
G. M. Johnson
通讯作者：
G. M. Johnson
DOI：
--
发表时间：
1971
期刊：
影响因子：
--
作者：
G. M. Johnson
通讯作者：
G. M. Johnson
影响因子：
3.7
作者：
L. Gan;T. Nickels
通讯作者：
T. Nickels