Use the Thermoviscous Acoustics Model node to define the model inputs (the background equilibrium temperature and pressure) and the material properties of the fluid (equilibrium density, dynamic viscosity, bulk viscosity, thermal conductivity, and heat capacity at constant pressure) necessary to model the transient propagation of acoustic compressible waves in a thermoviscous acoustic context. Extended inputs are available for the coefficient of thermal expansion and the compressibility, which enables modeling of any constitutive relation for the fluid.
The Model Inputs, the
Thermoviscous Acoustics Model, and the
Thermal Expansion and Compressibility sections are the same as for the frequency domain interface. They are described under the
Thermoviscous Acoustics Model section in
The Thermoviscous Acoustics, Frequency Domain Interface.