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Transient Gaussian Explosion

Application ID: 1374

An ellipse with sound-hard walls has the interesting property that an acoustic signal emanating from one of the foci refocuses at the other focal point b/c seconds later, where b (in meters) is the major axis length and c (m/s) is the speed of sound.

This model involves a Gaussian explosion at one focus of an ellipse to illustrate some properties of time-dependent acoustic problems.

The model also introduces and demonstrates some important concepts to keep in mind when solving transient problems. In particular, the relationship between the frequency content in the forcing, the mesh resolution and the time step length is examined.

This model is included as an example in the following products:

Acoustics Module

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.