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arXiv 1604.01092math.AP
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深水中孤波的积分和渐近性质

Integral and asymptotic properties of solitary waves in deep water

Miles H. Wheeler

摘要:

我们考虑二维和三维重力和重力毛细孤立波在无限深。假设代数衰减率的自由表面和速度势,我们表明,速度势必然表现得像一个偶极子在无穷远,并获得一个相关的渐近公式的自由表面。然后,我们证明了一个身份有关的“偶极矩”的动能。这意味着渐近中的首阶项是非零的,特别是角动量是无穷大的。最后,我们证明了一个相关的积分恒等式,它排除了波的纯海拔或纯抑郁症。

英文摘要:

We consider two- and three-dimensional gravity and gravity-capillary solitary water waves in infinite depth. Assuming algebraic decay rates for the free surface and velocity potential, we show that the velocity potential necessarily behaves like a dipole at infinity and obtain a related asymptotic formula for the free surface. We then prove an identity relating the "dipole moment" to the kinetic energy. This implies that the leading-order terms in the asymptotics are nonvanishing and in particular that the angular momentum is infinite. Lastly we prove a related integral identity which rules out waves of pure elevation or pure depression.

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