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1. Simple finite elements and multigrid for efficient mass-consistent wind downscaling in a coupled fire-atmosphere model

Author

Mandel, J., Farguell, A., Kochanski, A. K., Mallia, D. V., and Hilburn, K.

Subjects
Physics - Atmospheric and Oceanic Physics, Atmospheric and Oceanic Physics (physics.ao-ph), 65N30, 65N55, 86A10, FOS: Mathematics, FOS: Physical sciences, Numerical Analysis (math.NA), Mathematics - Numerical Analysis, Physics::Atmospheric and Oceanic Physics
Abstract

We present a simple finite element formulation of mass-consistent approximation, and a fast multigrid iterative method with adaptive semicoarsening, which maintains the convergence of the iterations over a range of grids and penalty coefficients. The method is designed to run in each time step of WRF-SFIRE and replace the interpolation from the atmospheric mesh to the fire mesh by a diagnostic model of the air flow over a fine-scale terrain., 4 pages, Seminar on Numerical Analysis - SNA'21, Ostrava, Czech Republic, January 25--28, 2021

Published
2021

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