Year: 2019
Author: Daomin Cao, Zhongyuan Liu
Annals of Applied Mathematics, Vol. 35 (2019), Iss. 3 : pp. 221–249
Abstract
In this paper, we construct stationary classical solutions of the shallow
water equation with vanishing Froude number $Fr$ in the so-called lake model.
To this end we need to study solutions to the following semilinear elliptic
problem
for small $ε$ > 0, where $p$ > 1, div($\frac{∇q}{b}$)
= 0 and $Ω$ ⊂ $\mathbb{R}$2 is a smooth bounded
domain.
We show that if $\frac{q^2}{b}$ has $m$ strictly local minimum (maximum) points $\widetilde{z}_i$, $i$ =
1, · · · , $m$, then there is a stationary classical solution approximating stationary $m$ points vortex solution of shallow water equations with vorticity $\sum\limits_{i=1}^m$ $\frac{2πq(\widetilde{z}_i)}{b(\widetilde{z}_i)}$.
Moreover, strictly local minimum points of $\frac{q^2}{b}$ on the boundary can also give
vortex solutions for the shallow water equation.
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Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/2019-AAM-18081
Annals of Applied Mathematics, Vol. 35 (2019), Iss. 3 : pp. 221–249
Published online: 2019-01
AMS Subject Headings: Global Science Press
Copyright: COPYRIGHT: © Global Science Press
Pages: 29
Keywords: shallow water equation free boundary stream function vortex solution.