Fluid materials for acoustic analyses

Fluid materials let you define material properties for fluids, including liquids and gasses. You must specify any two of C (Speed of Sound), RHO (Mass Density), and K (Bulk Modulus). The third is then calculated from:

Analyses

Acoustic and vibro-acoustic analyses, such as those performed with Simcenter Nastran and Simcenter 3D Acoustics BEM, use fluid materials. For example:

• In Simcenter Nastran Acoustic and Vibro-Acoustic analyses, you can use fluid materials to model a 3D fluid domain inside or outside an enclosure.

• In Acoustics BEM Direct Acoustic, Indirect Acoustic, and Indirect Vibro-Acoustic analyses, you can use fluid materials to model a 2D fluid domain.

Where do I find it?

Application	Pre/Post
Prerequisites	A FEM file as the work part and displayed partSupported solver and analysis typeSimcenter NastranAcoustic or Vibro-Acoustic as the specified analysis typeSimcenter 3D Acoustics BEMDirect Acoustic, Indirect Acoustic, or Indirect Vibro-Acoustic as the specified analysis typeType = Fluid
Command Finder	Manage Library Materials Manage Materials Assign Materials Physical Properties

How do I

Define a porous material

Define acoustic properties of fluids with CFD results

Learn more

Meshing for acoustic analyses

Meshing for FEM acoustic analysis

Supported element types for FEM acoustic analysis

Element size for acoustic analysis

Solution stabilization options

Defining acoustic properties of fluids with CFD results

Look up more details

Supported fluid material properties

Porous materials

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

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Fluid materials for acoustic analyses, Simcenter 3D 2021.1 Series

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