Jets in Crossflow — Scalar Mixing via PLIF

  • M. G. Mungal
  • S. H. Smith
Part of the International Centre for Mechanical Sciences book series (CISM, volume 439)


The scalar concentration field of the round jet in a uniform crossflow is studied for a range of jet to crossflow velocity ratios, r, with emphasis on r = 10 and 20, using planar laser-induced fluorescence (PLIF) of acetone. For a top-hat jet exit velocity profile, the emerging presence of jet fluid in the wake structures is seen for for r > 10. The near-field region is characterized by a centerline concentration decay of s −1.3 , an improvement over the mixing rate s −1 of the free jet. The far-field is marked by a branching away from the s −1.3 decay and approaching a decay of s −2/3 a rate derived from modelling efforts. When normalized by r 2 d, the branch points occur at a uniform jet position, x/r 2 d ~ 0.2. The view of the branch points as points of transition in the flow is reinforced by the probability density function (pdf) results along the upper edge of the jet.


Branch Point Horseshoe Vortex Planar Laser Induce Fluorescence Wake Structure Horseshoe Vortex System 
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  1. Andreopoulos, J. and Rodi, W. (1984). Experimental investigation of jets in a crossflow. J. Fluid Mech. 138: 93–127.CrossRefGoogle Scholar
  2. Broadwell, J.E. and Breidenthal, R.E. (1984). Structure and mixing of a transverse jet in incompressible flow. J. Fluid Mech. 148: 405–412.CrossRefGoogle Scholar
  3. Chassaing, P., George, J., Claria, A. and Sananes, F. (1974). Physical characteristics of subsonic jets in a cross-stream. J. Fluid Mech. 62: 41–64.CrossRefGoogle Scholar
  4. Fric, T.F. and Roshko, A. (1994). Vortical structure in the wake of a transverse jet. J. Fluid Mech. 279: 147.CrossRefGoogle Scholar
  5. Hasselbrink, E.F. and Mungal, M.G. (1996). An analysis of the time-averaged far-field properties of the tranverse jet. AIAA Paper 96–0201, AIAA Thirty-fourth Aerospace Sciences Meeting and Exhibit, Reno, NV.Google Scholar
  6. Kamotani, Y. and Greber, I. (1972). Experiments on a turbulent jet in a cross flow. AIAA J. 10: 1425–1429.CrossRefGoogle Scholar
  7. Keffer, J. F. and Baines, W. D. (1963). The round turbulent jet in a cross-wind. J. Fluid Mech. 15: 481–496.CrossRefzbMATHGoogle Scholar
  8. Kelso, R.M., Lim, T.T. and Perry, A.E. (1996). An experimental study of round jets in cross-flow. J. Fluid Mech. 306: 11–144.CrossRefGoogle Scholar
  9. Kelso, R.M. and Smits, A.J. (1995). Horseshoe vortex systems resulting from the interaction between a laminar boundary layer and a transverse jet. Phys. Fluids A 7: 153–158.Google Scholar
  10. Lozano, A., Yip, B. and Hanson, R. K. (1992). Acetone: a tracer for concentration measurements in gaseous flows by planar laser-induced fluorescence. Exps. Fluids 13: 369–376.CrossRefGoogle Scholar
  11. Margason, R.J. (1993). Fifty years of jet in cross flow research. AGARD-CP 534, Paper 1.Google Scholar
  12. Papaspyros, J. N. E., Kastrinakis, E. G. and Nychas, S. G. (1997). Coherent contribution to turbulent mixing of a jet in cross flow. Applied Scientific Research, 57: 291–307.CrossRefGoogle Scholar
  13. Patrick, M. A. (1967) Experimental investigation of the mixing and penetration of a round turbulent jet injected perpendicularly into a transverse stream. J. Hydronaut. Div. ASCE 45: 16–31.Google Scholar
  14. Pratte, B.D. and Baines, W.D. (1967). Profiles of the round turbulent jet in a cross flow. J. Hydronaut. Div. ASCE 92: 53–64.Google Scholar
  15. Sherif, S.A. and Pletcher, R.H. (1991). Jet-wake thermal characteristics of heated turbulent jets in crossflow. J. Thermophysics 5: 181–191.CrossRefGoogle Scholar
  16. Smith, S.H. (1996). The Scalar Concentration Field of the Axisymmetric Jet in Crossflow. Ph.D. thesis, Stanford University.Google Scholar
  17. Smith, S.H. and Mungal, M.G. (1998). Mixing, structure and scaling of the jet in cross flow. J. Fluid Mech. 357: 83–122.CrossRefGoogle Scholar
  18. Sykes, W., Lewellen, W. and Parker, S. (1986). On the vorticity dynamics of a turbulent jet in a crossflow. J. Fluid Mech. 168: 393–413.CrossRefzbMATHGoogle Scholar
  19. Yuan, L.L. (1997). Large eddy simulations of a jet in crossflow. Ph.D. Thesis, Stanford University.Google Scholar

Copyright information

© Springer-Verlag Wien 2003

Authors and Affiliations

  • M. G. Mungal
    • 1
  • S. H. Smith
    • 1
  1. 1.Mechanical Engineering DepartmentStanford UniversityStanfordUSA

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