The Linearized Euler Model node adds the governing equations, and define the background mean flow and the ideal gas fluid properties. Gradient term suppression stabilization (advanced physics option) can be selected, if needed. See the Linearized Euler Model for The Linearized Euler, Frequency Domain Interface for details.

Define the Propagation direction of the computed modes. The default is to use the surface physics normal (components lebm.nx, lebm.ny, and lebm.nz) that points out of domains.