TY - GEN
T1 - Mixing at the external boundary of a submerged turbulent jet
AU - Eidelman, A.
AU - Elperin, T.
AU - Kleeorin, N.
AU - Hazak, G.
AU - Rogachevskii, I.
AU - Sadot, O.
AU - Sapir-Katiraie, I.
N1 - Funding Information:
Acknowledgement. We thank A. Krein for his assistance in construction of the experimental set-up, and I. Golubev and S. Rudykh for their assistance in processing the experimental data. This research was supported in part by the Israel Science Foundation governed by the Israeli Academy of Science, the Israeli Universities Budget Planning Committee (VATAT) and Israeli Atomic Energy Commission.
Publisher Copyright:
© 2010, Springer Science and Business Media, LLC. All rights reserved.
PY - 2010/1/1
Y1 - 2010/1/1
N2 - We study experimentally and theoretically mixing at the external boundary of a submerged turbulent jet. In the experimental study we use Particle Image Velocimetry and an Image Processing Technique based on the analysis of the intensity of the Mie scattering to determine the spatial distribution of tracer particles. An air jet is seeded with the incense smoke particles which are characterized by large Schmidt number and small Stokes number. We determine the spatial distributions of the jet fluid characterized by a high concentration of the particles and of the ambient fluid characterized by a low concentration of the tracer particles. In the data analysis we use an approach that is based on analysis of the two-point second-order correlation function of the particle number density fluctuations generated by tangling of the gradient of the mean particle number density by the turbulent velocity field. This gradient is formed at the external boundary of a submerged turbulent jet. We demonstrate that the two-point second-order correlation function of the particle number density does not have universal scaling and cannot be described by a power-law function. The theoretical predictions made in this study are in a qualitative agreement with the obtained experimental results.
AB - We study experimentally and theoretically mixing at the external boundary of a submerged turbulent jet. In the experimental study we use Particle Image Velocimetry and an Image Processing Technique based on the analysis of the intensity of the Mie scattering to determine the spatial distribution of tracer particles. An air jet is seeded with the incense smoke particles which are characterized by large Schmidt number and small Stokes number. We determine the spatial distributions of the jet fluid characterized by a high concentration of the particles and of the ambient fluid characterized by a low concentration of the tracer particles. In the data analysis we use an approach that is based on analysis of the two-point second-order correlation function of the particle number density fluctuations generated by tangling of the gradient of the mean particle number density by the turbulent velocity field. This gradient is formed at the external boundary of a submerged turbulent jet. We demonstrate that the two-point second-order correlation function of the particle number density does not have universal scaling and cannot be described by a power-law function. The theoretical predictions made in this study are in a qualitative agreement with the obtained experimental results.
UR - http://www.scopus.com/inward/record.url?scp=85034641388&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-02225-8_51
DO - 10.1007/978-3-642-02225-8_51
M3 - Conference contribution
AN - SCOPUS:85034641388
SN - 9783642022241
T3 - Springer Proceedings in Physics
SP - 211
EP - 214
BT - Progress in Turbulence III - Proceedings of the iTi Conference in Turbulence 2008
A2 - Oberlack, Martin
A2 - Peinke, Joachim
A2 - Talamelli, Alessandro
PB - Springer Science and Business Media, LLC
T2 - 3rd Conference on Turbulence, iTi 2008
Y2 - 1 January 2008 through 1 January 2008
ER -