vortexShed tutorial - noise utility returns nonsense to SPL and PSD files
Summary
Noise utility at vortexShed tutorial when run on points or on surface returns files with negative decibels (inverse and wrong values) in a frequency range from 0-50.
Steps to reproduce
Example case
$FOAM_TUTORIALS/incompressible/pimpleFoam/LES/vortexShed
What is the current bug behaviour?
The bug is most probably in the noise utility. At least on arm64 it returns SPL and PDBs with negative decibels. I am pretty sure the vortex shedding is not an active silencer. SPL:
gnuplot> plot 'SPL_dB_f.xy' w l
-20 +--------------------------------------------------------------------+
| + + + |
-40 |-+ *** 'SPL_dB_f.xy' *******-|
| ** * |
| ** * |
-60 |-+ ** * +-|
| **** * |
-80 |** ** +-|
| * |
| *** |
-100 |-+ * * +-|
| ** |
-120 |-+ *** +-|
| **** * |
| ***** * * * * * ***** * * |
-140 |-+ ************************************|
| *********************************|
-160 |-+ ************** ***************|
| * ****** * ** * * |
| + + + |
-180 +--------------------------------------------------------------------+
0.1 1 10Environment information
- OpenFOAM version : 2006
- Operating system : ubuntu 1804
- Hardware info : arm64 (Popeye03)
- Compiler : gcc (system one)