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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 application was built using the following:

Acoustics Module

The combination of COMSOL® products required to model your application depends on the physics interfaces that define it. Particular physics interfaces may be common to several products (see the Specification Chart for more details). To determine the right combination of products for your project, you should evaluate all of your needs in light of each product's capabilities, consultation with the COMSOL Sales and Support teams, and the use of an evaluation license.