Linearized Potential Flow Model
The Linearized Potential Flow Model node adds the equations for frequency domain aeroacoustics modeling. You here need to enter the material properties as well as the background mean flow information.
Linearized Potential Flow Model
The default values for the Density ρ0 (SI unit: kg/m3) and the Mean flow speed of sound c0 (SI unit: m/s) are taken From material. For User defined, enter other values or expressions. Also enter values or expressions for the Mean flow velocity V (SI unit: m/s).
It is important for the velocity field to be a solution to a compressible potential flow simulation. It has to be an irrotational and inviscid flow, for example, a constant flow field V is of this type or a solution modeled with The Compressible Potential Flow Interface. Any other type of flow yields nonphysical solutions for this formulation of the governing equations.
Coupling between the flow form The Compressible Potential Flow Interface interface to the linearized potential flow model can be set up using the Background Potential Flow Coupling coupling found under the Multiphysics Couplings node. The feature appears when both physics interfaces are present in a model.
Material discontinuities, that is jumps in the material properties, are not handled by the interface. A jump due to the presence of a shear layer that separates a stream from the free velocity field is handled using the Vortex Sheet condition.