Eqtype Specifies the equation to solve. This should be set to APE.
UpwindType Specifies the numerical interface flux scheme. Currently, only
APEUpwind supported.
Gamma: Ratio of specific heats
BaseFlow Baseflow (ui,p,ρ) defined by the variables u0,v0,w0,p0,rho0
Source Source term c2qc
InitialConditions