Skip to main content
SpringerLink
Log in

Flow visualization and scanning PIV measurement of three-dimensional structure in near field of strongly buoyant jet

  • Regular Paper
  • Published:
Journal of Visualization Aims and scope Submit manuscript

Abstract

The near-field structure of strongly buoyant jet issuing from a square nozzle at low Froude and Reynolds numbers is studied by using LIF flow visualization and time-resolved scanning PIV. These experimental techniques allow the visualization of unsteady three-dimensional flow phenomenon occurring in the near-field of strongly buoyant jet. It is found that the buoyant jet is unstable to the positive buoyancy forces, which promote the inflow motion near the nozzle exit. The surrounding low temperature fluid moves into the nozzle inside along the nozzle corner and mixes with the high temperature fluid deep into the nozzle. Then, the flow pattern inside the nozzle becomes highly complex to promote the laminar to turbulent transition of the jet. The statistical flow characteristics of the strongly buoyant jet are evaluated from the scanning PIV measurement, and the result indicates the presence of axisymmetric distributions of mean flow and velocity fluctuations in the circle of diameter equal to the square side of the nozzle.

Graphical Abstract

Graphical Abstract text

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11

Similar content being viewed by others

References

  • Anwar HO (1972) Appearance of unstable buoyant jet. J Hydraul Div HY7:1143–1156

    Google Scholar 

  • Chen CJ, Rodi W (1980) Vertical turbulent buoyant jets: a review of experimental data. Pergamon Press, Oxford

    Google Scholar 

  • Dai Z, Tseng L-K, Faeth GM (1994) Structure of round, fully developed, buoyant turbulent plumes. J Heat Transf 116:409–417

    Article  Google Scholar 

  • Fujisawa N, Funatani S, Katoh N (2005) Scanning liquid-crystal thermometry and stereo velocimetry for simultaneous three-dimensional measurement of temperature and velocity field in a turbulent Rayleigh-Bernard convection. Exp Fluids 38:291–303

    Article  Google Scholar 

  • Fujisawa N, Funatani S, Watanabe Y (2008) Simultaneous imaging techniques for temperature and velocity fields in thermal fluid flows. J Vis 11:247–255

    Article  Google Scholar 

  • Funatani S, Fujisawa N, Ikeda H (2004) Simultaneous measurement of temperature and velocity using two-colour LIF combined with PIV with a colour CCD camera and its application to the turbulent buoyant plume. Meas Sci Technol 15:983–990

    Article  Google Scholar 

  • George WK, Alpert RL, Tamanini F (1977) Turbulence measurements in an axisymmetric buoyant plume. Int J Heat Mass Transf 20:1145–1154

    Article  Google Scholar 

  • Hori T, Sakakibara J (2004) High-speed scanning stereoscopic PIV for 3D vorticity measurement in liquids. Meas Sci Technol 15:1067–1078

    Article  Google Scholar 

  • Knudsen JG, Katz DL (1979) Fluid dynamics and heat transfer. Krieger, New York, p 101

    Google Scholar 

  • List EJ (1982) Turbulent jets and plumes. Ann Rev Fluid Mech 14:189–212

    Article  Google Scholar 

  • Mollendorf JC, Gebhart B (1973) An experimental and numerical study of the viscous stability of a round laminar vertical jet with and without thermal buoyancy for symmetric and asymmetric disturbances. J Fluid Mech 61:367–399

    Article  MATH  Google Scholar 

  • Murota A, Nakatsuji K, Tamai M (1989) Experimental study on turbulence structure in turbulent plane forced plume. J Jpn Soc Civ Eng 405:79–87

    Google Scholar 

  • Papanicolaou PN, List EJ (1988) Investigations of round vertical turbulent buoyant jets. J Fluid Mech 195:341–391

    Article  Google Scholar 

  • Pasumarthi KS, Agrawal AK (2005) Buoyancy effects on flow transition in low-density inertial gas jets. Exp Fluids 38:541–544

    Article  Google Scholar 

  • Shabbir A, George WK (1994) Experiments on a round turbulent buoyant plume. J Fluid Mech 275:1–32

    Article  Google Scholar 

  • Subbarao ER, Cantwell BJ (1992) Investigation of co-flowing buoyant jet: experiments on the effects of Reynolds number and Richardson number. J Fluid Mech 245:69–90

    Article  Google Scholar 

  • Tian X, Roberts PJW (2003) A 3D LIF system for turbulent buoyant jet flows. Exp Fluids 35:636–647

    Article  Google Scholar 

  • Ungate CD, Harleman DRF, Jirka GB (1975) Stability and mixing of submerged turbulent jets at low Reynolds numbers. Energy Laboratory Report MIT-EL 75-014

  • Watanabe Y, Hashizume Y, Fujisawa N (2005) Simultaneous flow visualization and PIV measurement of turbulent buoyant plume. J Vis 8:293–294

    Article  Google Scholar 

  • Zhou X, Hitt DL (2004) Proper orthogonal decomposition analysis of coherent structures in a transient buoyant jet. J Turbul 5:1–21

    Article  Google Scholar 

  • Zhou X, Luo KH, Williams JJR (2001) Large eddy simulation of a turbulent forced plume. Eur J Mech B/Fluids 20:233–254

    Article  MATH  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Visualization Research Center, Niigata University, 8050 Nino-cho, Ikarashi, Nishi-ku, Niigata, 950-2181, Japan

    T. Syuto, N. Fujisawa, T. Takasugi & T. Yamagata

Authors
  1. T. Syuto
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. N. Fujisawa
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. T. Takasugi
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. T. Yamagata
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to N. Fujisawa.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Syuto, T., Fujisawa, N., Takasugi, T. et al. Flow visualization and scanning PIV measurement of three-dimensional structure in near field of strongly buoyant jet. J Vis 13, 203–211 (2010). https://doi.org/10.1007/s12650-010-0027-0

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s12650-010-0027-0

Keywords

Search

Navigation