The second variation of the stream function energy of water waves with vorticity

We compute the second variation of the stream function energy of two-dimensional steady free surface gravity water waves with vorticity in the stream function formulation. We prove that for nonpositive vorticity the second variation of the stream function energy at extreme waves with Stokes corner a...

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Published inJournal of Differential Equations Vol. 253; no. 9; pp. 2646 - 2656
Main Authors Weiss, Georg S., Zhang, Guanghui
Format Journal Article
LanguageEnglish
Published Elsevier Inc 01.11.2012
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Abstract We compute the second variation of the stream function energy of two-dimensional steady free surface gravity water waves with vorticity in the stream function formulation. We prove that for nonpositive vorticity the second variation of the stream function energy at extreme waves with Stokes corner asymptotics cannot be nonnegative in any small neighbourhood of a given isolated stagnation point. The particular form of our second variation suggests however the possibility that certain singularities in the case of nonzero vorticity might be constructible as minimizers of the stream function energy.
AbstractList We compute the second variation of the stream function energy of two-dimensional steady free surface gravity water waves with vorticity in the stream function formulation. We prove that for nonpositive vorticity the second variation of the stream function energy at extreme waves with Stokes corner asymptotics cannot be nonnegative in any small neighbourhood of a given isolated stagnation point. The particular form of our second variation suggests however the possibility that certain singularities in the case of nonzero vorticity might be constructible as minimizers of the stream function energy.
Author Weiss, Georg S.
Zhang, Guanghui
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10.1080/03605300600635012
10.4171/IFB/255
10.1111/1467-9590.01408
10.1002/cpa.3046
10.1016/j.anihpc.2012.05.001
10.1007/s11511-011-0066-y
10.1016/j.aim.2005.07.015
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10.1002/cpa.20165
10.1016/j.jde.2008.12.018
10.1088/0951-7715/21/5/012
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Keywords Second variation
Singularity
Water wave
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Stagnation point
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Stokes corner
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Snippet We compute the second variation of the stream function energy of two-dimensional steady free surface gravity water waves with vorticity in the stream function...
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SubjectTerms Second variation
Singularity
Stagnation point
Stokes corner
Water wave
Title The second variation of the stream function energy of water waves with vorticity
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Volume 253
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