Aeroacoustic analysis of a 2d square cylinder

busraeren · March 4, 2018, 06:14

Hello, i am currently studying on a 2d square cylinder in fluent. I am very new to fluent but i was able to generate appropriate geometry and mesh for my case with the help of literature search.

I need to use FW method to obtain sound pressure levels, psd plots and vertices. I dont know where to start or how to construct my case properly.

After generating mesh, to obtain more accurate data, i ran the simulation in steady, then transient. Everything seems normal but i dont know how to jump into aeroacoustic analysis after these steps. I put a point in the geometry where i want to obtain sound pressure levels but i couldnt manage to use aeroacoustics branch in fluent. Please help me.

Thank you all.

ishan_ae · March 17, 2018, 05:48

See this presentation. This is exactly what you are looking for. I used the same to perform a 2D CAA. The biggest problem is to estimate the Source Correlation Length, which I am yet to figure out what it exactly means. It's an input for FW-H model. I think you have to estimate it based on some experimental data. In the tutorial this length has been mentioned.

http://dl.mr-cfd.com/tutorials/ansys...s-Tut2-FWH.pdf

busraeren · March 17, 2018, 05:54

Quote:

Originally Posted by ishan_ae

See this presentation. This is exactly what you are looking for. I used the same to perform a 2D CAA. The biggest problem is to estimate the Source Correlation Length, which I am yet to figure out what it exactly means. It's an input for FW-H model. I think you have to estimate it based on some experimental data. In the tutorial this length has been mentioned.

http://dl.mr-cfd.com/tutorials/ansys...s-Tut2-FWH.pdf

Thank you !

March 4, 2018, 06:14	Aeroacoustic analysis of a 2d square cylinder	#1
busraeren New Member Büşra Eren Join Date: Mar 2018 Location: Turkey/Istanbul Posts: 14 Rep Power: 8	Hello, i am currently studying on a 2d square cylinder in fluent. I am very new to fluent but i was able to generate appropriate geometry and mesh for my case with the help of literature search. I need to use FW method to obtain sound pressure levels, psd plots and vertices. I dont know where to start or how to construct my case properly. After generating mesh, to obtain more accurate data, i ran the simulation in steady, then transient. Everything seems normal but i dont know how to jump into aeroacoustic analysis after these steps. I put a point in the geometry where i want to obtain sound pressure levels but i couldnt manage to use aeroacoustics branch in fluent. Please help me. Thank you all.

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March 17, 2018, 05:48		#2
ishan_ae Member ishan Join Date: Oct 2017 Posts: 77 Rep Power: 8	See this presentation. This is exactly what you are looking for. I used the same to perform a 2D CAA. The biggest problem is to estimate the Source Correlation Length, which I am yet to figure out what it exactly means. It's an input for FW-H model. I think you have to estimate it based on some experimental data. In the tutorial this length has been mentioned. http://dl.mr-cfd.com/tutorials/ansys...s-Tut2-FWH.pdf