This Application Best Practice (ABP) summarizes the development of two demonstration problems to illustrate the use of Ansys Fluent® fluid simulation software’s impedance Boundary Condition (BC) for simulating acoustic absorption at a wall with a prescribed impedance behavior. This is often referred to as a “soft wall” boundary, contrasting with a “hard wall” which is acoustically reflecting.
Learning Outcomes:
Following completion of this Application Best Practice (ABP), you will be able to:
- Differentiate between ""soft wall"" (acoustically absorbing) and ""hard wall"" (acoustically reflecting) boundaries.
- Apply impedance boundary conditions (BC) in Ansys Fluent software for simulating acoustic absorption.
- Setup and configure 2D and 3D models for acoustic simulations.
- Use Transparent Flow Forcing (TFF) to introduce acoustic signals at the inlet.
- Define specific geometry and flow conditions for 2D and 3D models.
- Generate meshes and set up solvers in Ansys Fluent software.
- Configure impedance BC using absorption coefficient data.
- Implement velocity inlet with zero velocity for soft wall modeling.
- Monitor and interpret pressure history and velocity magnitude.
- Compare acoustic signal attenuation between hard wall and soft wall models.
- Demonstrate acoustic damping using impedance BC in both 2D and 3D models.
- Assess the impact of steady throughflow on pressure wave propagation in 3D models.
- Simulate real-world scenarios involving acoustic absorption using Ansys Fluent software.
Prerequisites:
- Basic knowledge of Ansys Fluent software, especially unsteady flow modeling.
Please note: Application Best Practices (ABPs) outline engineering design goals for specific applications and provide guidance for how to achieve those goals using Ansys simulation software. It is important to note that a Geometry File or other Input Files are not always available. ABPs, as opposed to the official training-material workshops/tutorials, are not meant to be a step-by-step instruction document. ABPs are a link between product-based training courses and application specific tutorials, educating on the ""how"" and ""why"" of the best modeling approach, highlighting best practices and workflows for a particular application.
These training materials were developed and tested in the 2025R1 release.
-
Cost: $450.00
- Course Duration: 1-2 HOURS
- Skill Level: Expert
- Skills Gained: Acoustic Modeling, Impedance Boundaries, Fluent Simulation, Mesh Generation
No reviews available for this learning resource.
