Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
WAVELET DECOMPOSITION APPLICATIONS FROM PRESSURE SIGNALS FOR TURBULENCE ANALYSIS
Submission Author:
Celso Murilo dos Santos , SC
Co-Authors:
Celso Murilo dos Santos, Danieli Cristine Anversa, Carla Nayara Michels dos Santos, Dirceu Noriler, Henry França Meier
Presenter: Celso Murilo dos Santos
doi://10.26678/ABCM.COBEM2019.COB2019-2005
Abstract
The study and modeling of turbulence have been discussed for many decades, and as a result of these studies there are currently applied two great approaches to Computational Fluid Dynamics (CFD) simulations, being RANS (Reynolds Average Navier Stokes) and LES (Large Eddy Simulation) modeling are more used. Five numerical meshes of a device emulating a biphasic heat exchanger were constructed and RANS approach was used with the Transition SST turbulence model. The time of the simulation was 100 s and the system input pressure data were processed by wavelet technique (in 11 frequency bands) and by Fourier transform. The results show that the profile for the sparse mesh is closer to the expected behavior for RANS approach, while for the refined mesh it is closer to the expected behavior for LES approach.
Keywords
Turbulence Models, numerical mesh, wavelet decomposition, RANS, LES, Fast Fourier Transfor
