The viscous modulation of Lamb’s dipole vortex
The viscous modulation of Lamb’s dipole vortex
复制标题
兰姆偶极涡旋的粘性调制
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
B. W. V. D. Fliert
中科院分区：
文献类型：
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作者：
B. W. V. D. Fliert
兰姆偶极涡的绝热衰减的描述是出于变分表征的偶极子。描述中的参数是熵和线性动量积分的值，它们由于耗散而随时间变化。观察到偶极子在衰减过程中膨胀[半径R <$（νt）1/2]，而涡旋的振幅和平移速度随时间按（νt）−3/2和（νt）−1的比例减小。
A description of the adiabatic decay of the Lamb dipolar vortex is motivated by a variational characterization of the dipole. The parameters in the description are the values of the entrophy and linear momentum integrals, which change in time due to the dissipation. It is observed that the dipole dilates during the decay process [radius R∼(νt)1/2], while the amplitude of the vortex and its translation speed diminish in time proportional to (νt)−3/2 and (νt)−1.