A Compact Eulerian Representation of Axisymmetric Inviscid Vortex Sheet Dynamics
A Compact Eulerian Representation of Axisymmetric Inviscid Vortex Sheet Dynamics
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轴对称无粘涡片动力学的紧欧拉表示
DOI:
10.1002/cpa.21879
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发表时间:
2019
影响因子:
3
通讯作者:
Pesci A
中科院分区:
文献类型:
--
作者:
Pesci A
A classical problem in fluid mechanics is the motion of an axisymmetric vortex sheet evolving under the action of surface tension, surrounded by an inviscid fluid. Lagrangian descriptions of these dynamics are well‐known, involving complex nonlocal expressions for the radial and longitudinal velocities in terms of elliptic integrals. Here we use these prior results to arrive at a remarkably compact and exact Eulerian evolution equation for the sheet radiusr(z,t) in an explicit flux form associated with the conservation of enclosed volume. The flux appears as an integral involving the pairwise mutual induction formula for vortex loop pairs first derived by Helmholtz and Maxwell. We show how the well‐known linear stability results for cylindrical vortex sheets in the presence of surface tension and streaming flows [A. M. Sterling and C. A. Sleicher,J. Fluid Mech.68, 477 (1975)] can be obtained directly from this formulation. Furthermore, the inviscid limit of the empirical model of Eggers and Dupont [J. Fluid Mech.262205 (1994);SIAM J. Appl. Math.60, 1997 (2000)], which has served as the basis for understanding singularity formation in droplet pinchoff, is derived within the present formalism as the leading‐order term in an asymptotic analysis for long slender axisymmetric vortex sheets and should provide the starting point for a rigorous analysis of singularity formation. © 2019 the Authors.Communications on Pure and Applied Mathematicsis published by the Courant Institute of Mathematical Sciences and Wiley Periodicals, Inc.
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DOI:
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发表时间:
1974
期刊:
影响因子:
--
作者:
S. Okui
通讯作者:
S. Okui
影响因子:
3.4
作者:
V. Meleshko
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影响因子:
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作者:
Raymond E. Goldstein;Raymond E. Goldstein;Adriana I. Pesci;Adriana I. Pesci;Michael J. Shelley
通讯作者:
Michael J. Shelley
DOI:
--
发表时间:
2001
期刊:
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Q. Nie
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Q. Nie
DOI:
--
发表时间:
1992
期刊:
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作者:
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通讯作者:
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