November 15, 2023 at 11:18 pmGorilla KoalaSubscriber
I'm looking for a way to calculate flow-induced sound propagation incident to pipe wall. At first I thought I could use the DAVA method, but it doesn't calculate flow-induced sound (https://forum.ansys.com/forums/topic/import-cgns-file-to/).
I'm thining to use Fluent's wave equation model to calulate the sound source. But the model treats the face between the pipe and the fluid domain as rigid boundary condition which means all the incident sound wave is relected. I want to change it to an impedance boundary condition and calculate the sound propagation inside the pipe.
I think using UDF (User Difined Function) may have a potential to calculate what I want to do but I have not find any relative literature so far. Would you please let me know if you have any suggestion.
November 29, 2023 at 2:49 pmHauke ReeseSubscriber
Hello Gorilla Koala, The DAVA workflow is a 1 way coupling between CFD and harmonic acoustics. At first CFD calculation compressible transient simulation is done. The static pressure which represends the hydrodynamic and acoustics fluctuation are sampled at the wall. Secondly the harmonic acoustics simulation calculate the solid vibration and the sound propatation the ambient. I think this is the most strate forward way. If you uses the wave a equation you can extract the particle velocity as source via scripting and hand it over to ANSYS. Basiclly it yields to a similar approach as the DAVA workflow does but the workflow needs some scripting to extract and export the sources and it will neglect the hydrodynamic exciatation. As you point out already in both workflows the wall is also treated as sound hard and waves are reflected. I think this a valid asumption. If the effect of the solid wall need to be taking into account correctly (reflection and also vibration) a 2 way FSI is needed.
- You must be logged in to reply to this topic.
Boost Ansys Fluent Simulations with AWS
Computational Fluid Dynamics (CFD) helps engineers design products in which the flow of fluid components is a significant challenge. These different use cases often require large complex models to solve on a traditional workstation. Click here to join this event to learn how to leverage Ansys Fluids on the cloud, thanks to Ansys Gateway powered by AWS.
Earth Rescue – An Ansys Online Series
The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.
Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.
- legend min and max
- Ensight hot iron palette from an image
- Streamlines in EnSight using MRI data
- Import MRI data into Ensight
- FLUENT APPLICATIION ERROR
- Total Surface Heat Flux Calculation in Fluent
- Drop Test of a Water-Filled Tube
- Difference between “total pressure” and “absolute pressure”?
- Minimum Orthogonal Quality Less than 0.01 For Transonic Airfoil Flow Analysis
- obtaining pressure distribution by making points in ansys
© 2023 Copyright ANSYS, Inc. All rights reserved.