 |
 |
 |
|
|
|
[Sponsors] | ||||
September 17, 2021, 11:57
|
Why negative decibels
|
#1 |
|
Member
Join Date: Aug 2018
Posts: 85
Rep Power: 7  |
Hi, I am simulating noise over NACA0012. I got negative values at some points. I am trying to find out why negative decibels of sound we receive? Can anyone please explain? One more thing I am using Fluent it calculates the overall Sound pressure level and I have acoustic pressure files in .ard. I am trying to calculate sound pressure manually by using this acoustic pressure in files as p and po=1*10^-6 in the formula of SPL=20log(p/po). I am getting positive values, whereas in Fluent I also have negative values automatically in frequency analysis. Anyone please explain this too. Thank you all!
|
|
|
|
|
 |
| Thread Tools | Search this Thread |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| [Other] mesh airfoil NACA0012 | anand_30 | OpenFOAM Meshing & Mesh Conversion | 13 | March 7, 2022 17:22 |
| [blockMesh] non-orthogonal faces and incorrect orientation? | nennbs | OpenFOAM Meshing & Mesh Conversion | 7 | April 17, 2013 05:42 |
| [blockMesh] error message with modeling a cube with a hold at the center | hsingtzu | OpenFOAM Meshing & Mesh Conversion | 2 | March 14, 2012 09:56 |
| [blockMesh] BlockMesh FOAM warning | gaottino | OpenFOAM Meshing & Mesh Conversion | 7 | July 19, 2010 14:11 |
| [blockMesh] Axisymmetrical mesh | Rasmus Gjesing (Gjesing) | OpenFOAM Meshing & Mesh Conversion | 10 | April 2, 2007 14:00 |
Linear Mode
