Wavelet analysis of near-wall region in turbulent channel flow

• Autorzy: Wacławczyk M. , Pozorski J.
• Języki publikacji: EN

Abstrakty

EN

An experimentally obtained set of instantaneous velocity realisations in the near--wall region of the turbulent channel flow is analysed using the wavelet transform technique. Selected notions of the wavelet approach are recalled together with an example of signal analysis. Some ideas of mu Hi resolution analysis are originally explained. Results of the application of the wavelet multiresolution analysis to the velocity field are presented. Velocity fluctuation is decomposed into a nearly-Gaussian background flow and so-called coherent structures that are tentatively identified.

Słowa kluczowe

EN

turbulent channel flow; wavelet analysis; near-wall region

PL

przepływ burzliwy; przepływ w kanale; analiza falkowa

• Wydawca: Wydawnictwo Politechniki Częstochowskiej
• Czasopismo: Turbulence : international journal
• Rocznik: 2002
• Tom: Vol. 8-9
• Strony: 113--130
• Opis fizyczny: Bibliogr. 15 poz.

Twórcy

autor

Wacławczyk M.

• Institute of Fluid-Flow Machinery, Polish Academy of Sciences, ul. Fiszera 14, Gdańsk, Poland

autor

Pozorski J.

• Institute of Fluid-Flow Machinery, Polish Academy of Sciences, ul. Fiszera 14, Gdańsk, Poland

Bibliografia

• 1. Białasiewicz J., Falki i aproksymacje, WNT, Warszawa 2000.
• 2. Cantwell B.J., Organized Motion in Turbulent Flow, Annu. Rev. Fluid Mech. 1981, 13, 457-515.
• 3. Elsner J., Turbulencja przepływów, PWN, Warszawa 1986.
• 4. Farge M., Wavelet transform and their application to turbulence, Annu. Rev. Fluid Mech. 1992, 24, 359-457.
• 5. Farge M., Schneider K., Keylahan N., Non-Gaussianity and coherent vortex simulation for two-dimensional turbulence using an adaptative orthogonal wavelet basis, Phys. Fluids 1991, 11,2187-2201.
• 6. Holmes P., Lumley J.L., Berkooz G., Turbulence, coherent structures, dynamical systems and symmetry, Cambridge University Press, Cambridge 1996.
• 7. Kim J., Moin P., Moser R., Turbulence statistics in fully developed channel flow at low Reynolds number, J. Fluid Mech. 1987, 177, 133-166.
• 8. Lumley J.L., In simulation and modelling of turbulence flow, Oxford University Press 1996.
• 9. Menevaeu C., Analysis of turbulence in orthonormal wave representation, J. Fluid Mech. 1991, 232, 469-5 18.
• 10. Panton R.L., Self-sustaining mechanisms of wall turbulence, Computational Mechanics Publications, Southampton 1997.
• 11. Protas B., Schneider K., Farge M., A properties in Fourier and wavelet filtered forced two-dimensional turbulence, (in:) Advanced in Turbulence VIII, ed. C. Dopazo, CIMNE Barcelona, Proceedings of the Eighth European Turbulence Conference, Barcelona 2000, 793-796.
• 12. Robinson K.S., Coherent motions in the turbulent boundary layer, Annu. Rev. Fluid Mech. 1991, 25, 457-475.
• 13. Ronald J.A., Particle-imaging techniques for experimental fluid mechanics, Annu. Rev. Fluid Mech. 1991,23, 261-304.
• 14. Schneider K., Farge M., Wavelet approach for description and modelling of turbulence, (in Lecture Senes „Advances in Turbulence Modelling” von Karman Institute for Fluid Dynamics, Brussels, March 1998.
• 15. Tennekes H., Lumley J.L., A first course in turbulence, MIT Press, Cambridge, Mass. 1972.