On vanishing diffusivity selection for the advection equation
On vanishing diffusivity selection for the advection equation
We study the advection equation along vector fields singular at the initial time. More precisely, we prove that for divergence-free vector fields in $L^1_{loc}((0, T ]; BV (\mathbb{T}^d;\mathbb{R}^d))\cap L^2((0, T ) \times\mathbb{T}^d;\mathbb{R}^d)$, there exists a unique vanishing diffusivity solution. This class includes the vector field constructed by Depauw, for which there are infinitely many distinct bounded solutions to the advection equation.
Jules Pitcho、Massimo Sorella、Giulia Mescolini
数学
Jules Pitcho,Massimo Sorella,Giulia Mescolini.On vanishing diffusivity selection for the advection equation[EB/OL].(2025-07-06)[2025-07-16].https://arxiv.org/abs/2411.12910.点此复制
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