Helmholtz Resonator with Porous Layer
Application ID: 96871
This tutorial model shows a system consisting of a Helmholtz resonator on the side of a main duct. The resonator volume is partly filled with a porous material. The model computes the reflection, transmission, and absorption of the system.
Thermoviscous losses are included in the model using Narrow Region Acoustics, while the porous material is modeled with a Poroacoustics model. The porous domain is described with the full JCAL model as well as the Three-parameter JCAL approximation model, and the results are compared.
The model is featured in the blog post: Modeling Acoustical Properties of Porous Media in COMSOL®
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 Grille des Spécifications 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.