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SUMMARY:Anisotropic pressure and acceleration spectra in uniform shear flo
 w - Tsuji\, Y (Nagoya)
DTSTART:20080930T083000Z
DTEND:20080930T090000Z
UID:TALK13839@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:According to the local isotropic hypothesis\, the small scale 
 physical quantities such as velocity\, temperature and pressure fluctuatio
 ns are to be universal in any kind of turbulent flow. At this stage\, the 
 question is not whether this assumption is correct or not\, but seems to b
 e how the large scale anisotropy lost its information as the scale becomes
  small. In this talk\, the anisotropic effect on inertial-range quantities
  are directly checked following the formula presented by Ishihara\, Yoshid
 a and Kaneda (P.R.L.\,vol.88\,154501\,2002)\, in which the velocity correl
 ation spectrum was uniquely determined by the rate of strain tensor of mea
 n flow\, the energy dissipation of per unit mass\, and the two-non dimensi
 onal constants. This idea is applied to the pressure field in the uniform 
 shear flow\, and the shear effect on pressure and pressure gradient (accel
 eration) is studied experimentally up to the Reynolds number based on Tayl
 or micro scale is 800. The results show the excellent agreement with the p
 rediction by theory\, and the universal trend of anisotropic spectra was o
 bserved.
LOCATION:Seminar Room 1\, Newton Institute
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