Helmholtz Resonator Analyzed with Different Frequency Domain Solvers
Application ID: 20263
This model simulates a simple three-dimensional axisymmetric Helmholtz resonator, a classic acoustics model of a resonating circuit with a known theoretical solution. The idealized version considered here consists of a tube and a closed volume in series which are exposed to a pulsatile pressure. Real-world phenomena explained by the resonator include amongst others the resonance from blowing across the top of an empty bottle, the sound produced by closed-cavity drums such as the djembe, and subwoofers We use this model to illustrate how to use different numerical solvers. We solve this pressure acoustics problem for a range of frequencies using the following different solvers: (a) Frequency Domain with and without Asymptotic Waveform Evaluation (AWE) for faster solution, and (b) Frequency Domain-Modal which reconstructs the frequency response based on a specified set of eigenmodes.
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 Спецификация 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.