A time-domain finite element formulation of the equivalent fluid model for the acoustic wave equation

Topical Issue - Numerical, computational and theoretical acoustics

Open Access

Figure 3

Real and imaginary parts of the equivalent compressibility ${\hat{C}}_{eq} (f)$ ${\widehat{C}}_{\mathrm{eq}}(f)$ (left) and equivalent specific volume ${\hat{v}}_{eq} (f)$ ${\widehat{v}}_{\mathrm{eq}}(f)$ (right) as a function of frequency for the fictitious porous material mat1.

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