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Nonlinear Acoustics — Modeling of the 1D Westervelt Equation

Application ID: 12783

This model example shows how to model nonlinear propagation of 1D finite-amplitude Acoustic waves in fluids using Acoustics Module of COMSOL Multiphysics. The model is based on the 2nd order Westervelt equation.

The one dimensional nonlinear wave equation is solved in the time domain by adding the nonlinear term to the linear equation. The model does not include energy dissipation in order to compare the simulation results to the analytical solution. However, energy loss can be easily added in COMSOL. The analytical solution used for comparison is the Fubini solution which is valid for the region near the source.

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.