New Functionality in 4.2a

New Fluid Models For Pressure Acoustics

  • The Pressure Acoustics interface contains a number of new fluid models:
  • Macroscopic empirical porous models: In addition to the Delany-Bazley model, you can also choose the Miki model or create a user-defined model.
  • Thermally conducting fluid model
  • Thermally conducting and viscous fluid model
  • Biot equivalents using a porous model

Thermoacoustic-Solid Interaction Interfaces

New multiphysics interfaces for thermoacoustic-solid coupling in the frequency domain for 2D, 2D axisymmetric, and 3D models. The Thermoacoustic-Solid Interaction interfaces combine features from the Thermoacoustics and Solid Mechanics interfaces.

Voigt Notation for Anisotropic Linear Elastic Materials

Voigt notation is available for specification of orthotropic and anisotropic linear elastic materials in the Elastic Waves and Poroelastic waves interfaces, and is now used as the default notation.

Backward Compatibility vs. 4.2

  • The Pressure Acoustics and Transient Pressure Acoustics interfaces in version 4.2 are now called Pressure Acoustics, Frequency Domain and Pressure Acoustics, Transient, respectively. The names for other acoustics interfaces have changed in a similar way.
  • When creating an orthotropic or anisotropic linear elastic material in the Elastic Waves or Poroelastic waves interfaces, the default is now to use Voigt notation. This will cause a model created using an old Java script to fail. Adjust the Java file so that it explicitly selects Standard notation instead of Voigt notation when using orthotropic or anisotropic materials.