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Mathematics > Numerical Analysis
Title: Computational study of numerical flux schemes for mesoscale atmospheric flows in a Finite Volume framework
(Submitted on 30 Apr 2024)
Abstract: We develop, and implement in a Finite Volume environment, a density-based approach for the Euler equations written in conservative form using density, momentum, and total energy as variables. Under simplifying assumptions, these equations are used to describe non-hydrostatic atmospheric flow. The well-balancing of the approach is ensured by a local hydrostatic reconstruction updated in runtime during the simulation to keep the numerical error under control. To approximate the solution of the Riemann problem, we consider four methods: Roe-Pike, HLLC, AUSM+-up and HLLC-AUSM. We assess our density-based approach and compare the accuracy of these four approximated Riemann solvers using two two classical benchmarks, namely the smooth rising thermal bubble and the density current.
Submission history
From: Michele Girfoglio [view email][v1] Tue, 30 Apr 2024 13:42:01 GMT (5366kb,D)
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