Abstract
Measurement of the turbulent velocity field have been performed in a newly designed low-speed two-dimensional mixing layer facility. Mean and fluctuating velocity in the streamwise direction are measured by an I-type hot-wire anemometer, and the dissipation rate is evaluated from the time derivative of the fluctuating velocity signal based on the Taylor hypothesis and under the assumption of local isotropy of turbulence. The moments of velocity fluctuation up to the third order agree well with previous experiments and DNS, when normalized by the local turbulence velocity scale; the region of self-similarity in terms of the relative turbulence structure is found to be larger than the conventional definition of the global self similarity region where the turbulence velocity scale no longer varies in the streamwise direction. The dissipation rate can also be well correlated with the recent DNS result, when the Taylor micro length scale and local turbulence velocity scale are chosen as the characteristic length and velocity scales, respectively.
| Original language | English |
|---|---|
| Pages (from-to) | 2187-2193 |
| Number of pages | 7 |
| Journal | Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B |
| Volume | 62 |
| Issue number | 598 |
| Publication status | Published - 1996 Jun |
| Externally published | Yes |
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ASJC Scopus subject areas
- Mechanical Engineering
Cite this
Measurement of turbulent energy budget of the two-dimensional mixing layer (1st report, evaluation of the dissipation rate assuming local isotropy). / Hasegawa, Yoshiyuki; Obi, Shinnosuke; Masuda, Shigeaki.
In: Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 62, No. 598, 06.1996, p. 2187-2193.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Measurement of turbulent energy budget of the two-dimensional mixing layer (1st report, evaluation of the dissipation rate assuming local isotropy)
AU - Hasegawa, Yoshiyuki
AU - Obi, Shinnosuke
AU - Masuda, Shigeaki
PY - 1996/6
Y1 - 1996/6
N2 - Measurement of the turbulent velocity field have been performed in a newly designed low-speed two-dimensional mixing layer facility. Mean and fluctuating velocity in the streamwise direction are measured by an I-type hot-wire anemometer, and the dissipation rate is evaluated from the time derivative of the fluctuating velocity signal based on the Taylor hypothesis and under the assumption of local isotropy of turbulence. The moments of velocity fluctuation up to the third order agree well with previous experiments and DNS, when normalized by the local turbulence velocity scale; the region of self-similarity in terms of the relative turbulence structure is found to be larger than the conventional definition of the global self similarity region where the turbulence velocity scale no longer varies in the streamwise direction. The dissipation rate can also be well correlated with the recent DNS result, when the Taylor micro length scale and local turbulence velocity scale are chosen as the characteristic length and velocity scales, respectively.
AB - Measurement of the turbulent velocity field have been performed in a newly designed low-speed two-dimensional mixing layer facility. Mean and fluctuating velocity in the streamwise direction are measured by an I-type hot-wire anemometer, and the dissipation rate is evaluated from the time derivative of the fluctuating velocity signal based on the Taylor hypothesis and under the assumption of local isotropy of turbulence. The moments of velocity fluctuation up to the third order agree well with previous experiments and DNS, when normalized by the local turbulence velocity scale; the region of self-similarity in terms of the relative turbulence structure is found to be larger than the conventional definition of the global self similarity region where the turbulence velocity scale no longer varies in the streamwise direction. The dissipation rate can also be well correlated with the recent DNS result, when the Taylor micro length scale and local turbulence velocity scale are chosen as the characteristic length and velocity scales, respectively.
UR - http://www.scopus.com/inward/record.url?scp=0030168767&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0030168767&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0030168767
VL - 62
SP - 2187
EP - 2193
JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
SN - 0387-5016
IS - 598
ER -