A Discrete Model for Nonlocal Transport Equations with Fractional Dissipation

Abstract

In this note, we propose a discrete model to study one-dimensional transport equations with non-local drift and supercritical dissipation. The inspiration for our model is the equation $${\theta }_t+(H\theta ){\theta }_x+(-\Delta {)}^{\alpha }\theta =0$$ where $H$ is the Hilbert transform. For our discrete model, we present blow-up results that are analogous to the known results for the above equation. In addition, we will prove regularity for our discrete model which suggests supercritical regularity in the range $1/4<\alpha <1/2$ in the continuous setting.