Steady Compressible Convection

Abstract
The steady convective flow in a compressible fluid layer is computed, for different values of the parameters, using bifurcation theory. We show how to eliminate parasitic 0 eigenvalues due to the Galileian invariance of the problem, and to its partly hyperbolic structure. We compare results with direct numerical simulation, and we discuss the validity on a truncation at the second order in the amplitude for the velocity vector field.