  We introduce GEA (Geophysical and Environmental Applications), a new
open-source atmosphere and ocean modeling framework within the finite volume
C++ library OpenFOAM. Here, we present the development of a non-hydrostatic
atmospheric model consisting of a pressure-based solver for the Euler equations
written in conservative form using density, momentum, and total energy as
variables. We validate the solver for two idealized test cases involving
buoyancy driven flows: smooth and non-smooth rising thermal bubble. Through
qualitative and quantitative comparisons against numerical data available in
the literature, we show that our approach is accurate.
