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Relations of Near-Wall Streamwise Vortices to Wall Pressure Fluctuations in a Turbulent Boundary Layer
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 Title & Authors
Relations of Near-Wall Streamwise Vortices to Wall Pressure Fluctuations in a Turbulent Boundary Layer
Seong, Hyeong-Jin; Kim, Jung-Nyeon; Choe, Jeong-Il;
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The relations between wall pressure fluctuations and near-wall streamwise vortices are investigated in a spatially-developing turbulent boundary layer using the direct numerical simulation. The power spectra and two-point correlations of wall pressure fluctuations are presented to validate the present simulation. Emphasis is placed on the identification of the correlation between wall pressure fluctuations and streamwise vorticities. It is shown that wall pressure fluctuations are directly linked with the upstream streamwise vortices in the buffer region of the turbulent boundary layer. The maximum correlation occurs with the spanwise displacement from the location of wall pressure fluctuations. The conditionally-averaged vorticity field and the quadrant analysis of Reynolds shear stress indicate that the sweep events due to streamwise vortices generate positive wall pressure fluctuations, while negative wall pressure fluctuations are created beneath the ejection events and vortex cores. The instantaneous flow field and time records reveal that the rise of high wall pressure fluctuations coincide with the passages of the upstream streamwise vortices.
Direct Numerical Simulation;Wall Pressure Fluctuations;Streamwise Vorticity;Cross-Correlation Coefficient;
 Cited by
Willmarth, W.W. and Woolridge, C.E., 1962, 'Measurements of the Fluctuating Pressure at the Wall beneath a Thick Turbulent Boundary Layer,' J.Fluid Mech., Vol. 14, 187 crossref(new window)

Schewe, G., 1983, 'On the Structure and Resolution of wall Pressure Fluctutations Associated with Turbulent Boundary Layer Flow,' J.Fluid Mech., Vol. 134, 311 crossref(new window)

Choi, H. and Moin, P., 1990, 'On the Space - Time characteristics of Wall Pressure Fluctuations,' Phys.Fluids A, Vol. 2, 1450 crossref(new window)

Farabee, T. and Casarella, M.J., 1991, 'Spectral Features of Wall Pressure Fluctuations beneath Turbulent Boundary Layer,' Phys.Fluids A, Vol. 3, 2410 crossref(new window)

Lee, I. and Sung, H.J., 1999, 'Development of an Array of Pressure Sensors with PVDF Film,' Exp.Fluids, Vol.4(3), 633 crossref(new window)

Thomas, A.S.W.andBull, M.K., 1983, 'On the Role of Wall Pressure Fluctuations in Deterministic Motions in the Turbulent Boundary Layer,' J. Fluid Mech., Vol. 128, 283 crossref(new window)

Kobashi, Y. and Ichijo, M., 1986, 'Wall Pressure and Its Relation to Turbulent Structure of Boundary Layer,' Exp.Fluids, Vol. 4, 49 crossref(new window)

Johansson, A.V., Her, J.Y., and Haritonidis, J.H., 1987, 'On the Generation of High- Amplitude Wall Pressure Peaks in Turbulent Boundary Layers and spots,' J.Fluid Mech, Vol. 175, 119 crossref(new window)

Kim, J., 1989, 'On the Structure of Pressure Fluctuations in Simulated Turbulent Channel Flow,' J.Fluid Mech, Vol. 205, 421 crossref(new window)

Chang, P.A., Piomelli, U., and Blake, W.K., 1999, 'Relationship between Wall Pressure and Velocity Field source,' Phys.Fluids, 11, 3434 crossref(new window)

Cantwell, B.J., 1981, 'Organized Motion in Turbulent Flow,' Ann. Rev. Fluid Mech., Vol. 13, 131 crossref(new window)

Robinson, S.K., 1991, 'Coherent Motions in the Turbulent Boundary Layer,' Annu.Rev.Fluid Mech., Vol. 23, 601 crossref(new window)

Bernard, P.S., Thomas, J.M., and Handler, R.A., 1993, 'Vortex Dynamics and the Production of Reynolds Stress,' J. Fluid Mech., Vol. 253, 385 crossref(new window)

김경연, 백승진, 성형진, 2000, '비압축성 나비어-스톡스 방정식의 완전 내재적 분리 방법,' 대한기계학회논문집, 제24권, 제10호, 1317

Lund, T.S., Wu, X., Squires, K.D., 1998, 'Generation of Turbulent Inflow Data for Spatially- Developing Boundary Layer Simulations,' J.Comput.Phys., Vol. 140, 233 crossref(new window)

Na, Y. and Moin,P., 1996, 'Direct Numerical Smulation of Turbulent Boundary Layer with Adverse Pressure Gradient and Separation,' Report No. TF-68, Thermosciences Division, Department of Mechanical Engineering Stanford University

Spalart, P.R., 1988, 'Direct numerical Simulation of a Turbulent Boundary Layer up to Re_{\theta}$=1410,' J. Fluid Mech., Vol. 187, 61 crossref(new window)

Blake, W.K., 1970, 'Turbulent Boundary-Layer Wall-Pressure Fluctuations on Smooth and Rough Walls,' J.Fluid Mech., Vol. 44, 637 crossref(new window)

Jeon, S., Choi, H., Yoo, J.Y., and Moin, P., 1999, 'Space-Time Characteristics of the Wall Shear-Stress Fluctuations in a Low - Reynolds - Number Channel Flow,' Phys.Fluids, Vol. 11, 3084 crossref(new window)

Kravchenko, A.G., Choi, H., and Moin, P., 1993, 'On the Rlation of Near - Wall Streamwise Vortices to Wall Skin Friction in Turbulent Boundary Layer,' Phys.Fluids A, Vol. 5, 3307 crossref(new window)

Kim, J., Moin, P., and Moser, R.D., 1987, 'Turbulence Statistics in Fully Developed Channel Flow at Low Reynolds Number,' J.Fluid Mech., Vol. 177, 133 crossref(new window)

Jeong, J. and Hussain, F., 1995, 'On the Identification of a Vortex', J.Fluid Mech., Vol. 285, 69 crossref(new window)