Helmholtz Resonator with Flow: Imported Fluid Flow from CGNS Data
Application ID: 143941
Helmholtz resonators are used in exhaust systems, as they can attenuate a specific narrow frequency band. The presence of a flow in the system alters the acoustic properties of the resonator and the transmission loss of the subsystem. In this tutorial model, a Helmholtz resonator is located as a side branch to a main duct. The transmission loss through the main duct is investigated when a flow is introduced.
In this model the mean flow is imported and mapped using the Imported Fluid Flow interface and the CFD Data (CGNS) function. The model is set up for the case where the Mach number is equal 0.1. The acoustics problem is then solved using the Linearized Navier-Stokes, Frequency Domain (LNS) interface.
This model example illustrates applications of this type that would nominally be built using the following products:
however, additional products may be required to completely define and model it. Furthermore, this example may also be defined and modeled using components from the following product combinations:
The combination of COMSOL® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Specification Chart and make use of a free evaluation license. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this.