Numerical Solution of linear drift-diffusion and pure drift equations on one-dimensional graphs

Keywords

Advanced Numerical Methods for Scientific Computing
Code:
80/2024
Title:
Numerical Solution of linear drift-diffusion and pure drift equations on one-dimensional graphs
Date:
Monday 4th November 2024
Author(s):
Crippa, B.; Scotti, A.; Villa, A
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Abstract:
We propose numerical schemes for the approximate solution of problems defined on the edges of a one-dimensional graph. In particular, we consider linear transport and a drift-diffusion equations, and discretize them by extending Finite Volume schemes with upwind flux to domains presenting bifurcation nodes with an arbitrary number of incoming and outgoing edges, and implicit time discretization. We show that the discrete problems admit positive unique solutions, and we test the methods on the intricate geometry of an electrical treeing.