Wall pressure and shear stress spectra from direct numerical simulations of channel flow
Hu, Z.W., Morfey, C.L. and Sandham, N.D. (2006) Wall pressure and shear stress spectra from direct numerical simulations of channel flow. AIAA Journal, 44, (7), 1541-1549. (doi:10.2514/1.17638).
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Wall pressure and shear stress spectra from direct numerical simulations of turbulent plane channel flow are presented in this paper. Simulations have been carried out at a series of Reynolds numbers up to Reґ = 1440, which corresponds to Re = 6:92 x 10(4) based on channel width and centerline velocity. Single-point and two-point statistics for velocity, pressure, and their derivatives have been collected, including velocity moments up to fourth order.§ The results have been used to study the Reynolds number dependence of wall pressure and shear stress spectra.
It is found that the point spectrum of wall pressure collapses for Reґ ≥ 360 under a mixed scaling for frequencies lower than the peak frequency of the frequency-weighted spectrum, and under viscous scaling for frequencies higher than the peak. Point spectra of wall shear stress components are found to collapse for Reґ ≥ 360 under viscous scaling. The normalized mean square wall pressure increases linearly with the logarithm of Reynolds number. The rms wall shear stresses also increase with Reynolds number over the present range, but suggest some leveling off at high Reynolds number.
|Subjects:||T Technology > TL Motor vehicles. Aeronautics. Astronautics
Q Science > QC Physics
|Divisions:||University Structure - Pre August 2011 > Institute of Sound and Vibration Research > Fluid Dynamics and Acoustics
University Structure - Pre August 2011 > School of Engineering Sciences > Aerodynamics & Flight Mechanics
|Date Deposited:||06 Jun 2006|
|Last Modified:||02 Mar 2012 11:47|
|Contributors:||Hu, Z.W. (Author)
Morfey, C.L. (Author)
Sandham, N.D. (Author)
|Contact Email Address:||email@example.com|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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