

VISUALIZING THE EVOLUTION AND INTERECTION OF VORTICES IN A QUASI TWODIMENSIONAL JET
Shestakov M.V.^{1}, Tokarev M.P.^{1}, Markovich D.M.^{1,2}
^{1} Institute of Thermophysics SB RAS, Novosibirsk, Russia ^{2} Novosibirsk State University, Novosibirsk, Russia
Citation:
Shestakov, M.V., Tokarev, M.P. and Markovich, D.M., (2015) Visualizing the evolution and interection of vortices in a quasi twodimensional jet, Modern Science: Researches, Ideas, Results, Technologies, Iss. #1(16), PP. 211  216.

Keywords: quasitwodimensional jet; timeresolved tomographic PIV; dynamics of vortex structure 
Abstracts:
The work focuses on investigation of spatialtemporal 3D vortex structure of a quasi twodimensional turbulent jet. Timeresolved tomographic PIV technique with repetition rate up to 10 kHz was used to measure 3D velocity distributions. It was shown that in quasi twodimensional turbulent jet two types of coherent vortex structures exist. On the basis of instantaneous distributions of Q criterion 3D dynamics of vortex structure is studied. Longitudinal secondary vortex structures in far field of the quasi twodimensional turbulent jet were detected for the first time. 
References:
Bilskiy A.V., Lozhkin V.A., Markovich D.M., Tokarev M.P., Shestakov M.V. Optimizatsiya i testirovanie tomograficheskogo metoda izmereniya skorosti v obeme potoka. // Teplofizika i aeromekhanika, T. 18, № 4, 2011, pp., 112.
Bilsky A.V., Markovich D.M., Shestakov M.V., Tokarev M.P. Tomographic PIV and planar Timeresolved PIV measurements in a turbulent slot jet // Proc. of the 16th international symposium on applications of laser techniques to fluid mechanics, Lisbon, pp 0912 July, 2012
Bilsky A.V., Lozhkin V.A., Markovich D.M., Tokarev M.P. A maximum entropy reconstruction technique for tomographic particle image velocimetry // Meas. Sci. Technol. 2013. 24. 045301
Daoyi, C., and Jirka, G.H. Linear stability analysis of turbulent mixing layers and jets in shallow water layers // Journal of Hydraulic Research, Vol. 36, 1998, pp. 815830.
Dracos, T, Giger, M, and Jirka, G (1992) Plane turbulent jets in a bounded fluid layer //Journal of Fluid Mechanics, vol. 241, pp. 587614.
Foss, J.F. & Jones J. B, Secondary flow effects in a bounded rectangular jet // Journal of Fluids Engineering, vol. 90, 1968, pp. 241248.
Holdeman J.D., Foss J.F. The initiation, development and decay of the secondary flow in а bounded jet // Trans. ASME, J. of Fluid Eng.  1975.  P. 342  352.
Hunt, J.C.R., Wraya A.A., and Moin ,P. Eddies, stream, and convergence zones in turbulent flows. Center for Turbulence Research Report, CTRS88, 1988p. 193.
Jirka, G.H. Large scale flow structures and mixing processes in shallow flows // Journal Hydraulic Research, vol. 39, 2001, pp. 567573.
Landel JR, Caulfield CP, Woods AW (2012) Meandering due to large eddies and the statistically selfsimilar dynamics of quasitwodimensional jets. J Fluid Mech 692:347368.
McCabe, A., An experimental investigation of a plane subsonic jet with an aspect ratio of three // Proceeding of the Proceedings of the Institution of Mechanical Engineers vol. 183, 1967 pp. 342346.
Nozaki, T., et al., Study of a Bounded Jet Flow Considering the Initial Turbulence (Experiments with a Nozzle Having Aspect Ratio of 3) // Bull. Jpn. Soc. Mech. Eng., vol.27, No.234, 1984, p.2730.
Nozaki, T., et al., Experimental Study of a Bounded Jet Flow (Mechanism of the Secondary Flow) // Proceeding of the 4th International Symp. Flow Visualization, 1986, pp.495499.
Peltier Y. Experimental and numerical investigation of meandering jets in shallow reservoir: potential impacts on deposit patterns // THESIS, Twophase modeling for Sediment dynamics in Geophysical Flows, At Chatou, France 2013 http://hdl.handle.net/2268/155314.
Scarano, F. Tomographic PIV: principles and practice // Measurement Science and Technology, vol. 24, 2013, 012001.
Shestakov, M.V., Dulin, V.M., Tokarev, M.P., Sikovsky, D.P., and Markovich, D.M., PIV study of largescale flow organisation in slot jets // International Journal of Heat and Fluid Flow, vol. 51, 2014, pp. 335352.
Shestakov M.V., Dulin V.M., Tokarev M.P., Markovich D.M. Dynamics of primary and secondary vortices in a slot jet // Proceeding of the 9th international symposium on turbulence and shear flow phenomena, Melbourne, Australia, 2015.
Wieneke, B., Volume selfcalibration for 3D particle image velocimetry // Experiments in Fluids, vol. 45, 2008 pp. 549456.


