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 example illustrates applications of this type that would nominally be built using the following products:Acoustics Module
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 de 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.