Numerical Study of Twin Jets Interactions using Realizable Model

Document Type : Original Article


1 Laboratory of Materials, Energetic Systems Technology and Environment, University of Ghardaia, Ghardaia, Algeria

2 University of Larbi ben M’hidi, Oum Elbouaghi, Algeria


In the present study, we numerically investigated the twin turbulent jets characteristics and turbulent quantities when a solid object is placed between the two nozzles. The two jets are assumed to be isothermal, incompressible and fully developed. Turbulence is modeled by the k-e Realizable model. The set of Reynolds averaged Navier Stokes equations are solved iteratively by the Fluent software. The numerical model is validated with the experimental results available in the literature. For many Reynolds numbers, it was found that velocities and its gradients decay along the longitudinal direction. The placement of a solid object between the twin jet affects the flow structure behind nozzles due to the curvature effect of the solid object. The converging region is disappeared and the combined points axial position increases with Reynolds number. The evolution is almost linearly with an increase in Reynolds number. The effect of  turbulence intensity at the exit of the nozzle is also examined. For a fixed Reynolds number, the axial combined position increases almost linearly with turbulence intensity.


Main Subjects

  1. Tanaka, E.J.B.o.J., "The interference of two-dimensional parallel jets: 1st report, experiments on dual jet", Bulletin JSME, Vol. 13, No. 56, (1970), 272-280, doi: 10.1299/jsme1958.13.272
  2. Tanaka, E.J.B.o.J., "2nd report, experiments on the combined flow of dual jet", Bulletin JSME, Vol. 17, (1974), 920-927, doi: 10.1299/jsme1958.17.920
  3. Fairuzov, Y.V. and Arvizu, H.J.J.H.T., "Numerical solution for transient conjugate two-phase heat transfer with heat generation in the pipe wall", Journal of Heat Transfer, Vol. 124, No. 6, (2002), 1213-1218, doi: 10.1115/1.1470170
  4. Tenchine, D. and Moro, J.P., "Experimental and numerical study of coaxial jets", Vol. 3, (1997), 1381–1387, doi: 10.1080/18811248.1998.9733851
  5. Mohammadi, M., Samadi, S. and Najafpour Darzi, G.J.I.J.o.E., "Production of single cell protein from sugarcane bagasse by saccharomyces cerevisiae in tray bioreactor", International journal of engineering, Transactions A: Basics, Vol. 29, No. 8, (2016), 1029-1036, doi: 10.5829/idosi.ije.2016.29.10a.13
  6. Kwon, S.J. and Seo, I.W.J.E.i.f., "Reynolds number effects on the behavior of a non-buoyant round jet", Experiments in Fluids, Vol. 38, No. 6, (2005), 801-812, doi: 10.1007/s00348-005-0976-6
  7. Ali, M., Ahmed, S. and SADR, A.A., "A numerical study on mixing of transverse injection in supersonic combustor", International journal of engineering, Transactions A: Basics, (2004).
  8. Elbanna, H. and Sabbagh, J.J.A.j., "Interaction of two nonequal plane parallel jets", AIAA Journal, Vol. 25, No. 1, (1987), 12-13, doi: 10.2514/3.9571
  9. Nasr, A. and Lai, J.J.E.i.f., "Two parallel plane jets: Mean flow and effects of acoustic excitation", Experiments in Fluids, Vol. 22, No. 3, (1997), 251-260, doi: 10.1007/s003480050044
  10. Elbanna, H., Gahin, S. and Rashed, M.J.A.j., "Investigation of two plane parallel jets", AIAA Journal, Vol. 21, No. 7, (1983), 986-991, doi: 10.2514/3.8187
  11. Elbanna, H., Sabbagh, J. and Rashed, M.J.A.j., "Interception of two equal turbulent jets", AIAA Journal, Vol. 23, No. 7, (1985), 985-986, doi: 10.2514/3.9027
  12. Abdel-Rahman, A.J.W.t.o.F.M., "A review of effects of initial and boundary conditions on turbulent jets", WSEAS Transactions on Fluid Mechanics, Vol. 4, No. 5, (2010), 257-275, doi:
  13. Pandey, K., Kumar, V.J.I.J.o.E.S. and Development, "Cfd analysis of twin jet flow at mach 1.74 with fluent software", International Journal of Environmental Science and Development, Vol. 1, No. 3, (2010), 423-428, doi: 10.7763/IJESD.2010.V1.81
  14. Mosavati, M., Balachandar, R. and Barron, R.J.P.o.F., "Characteristics of self-oscillating twin jets", Physics of Fluids 33, Vol. 33, No. 3, (2021), 035129, doi: 10.1063/5.0033869
  15. Hao, K., Tian, A., Zhou, Y.J.I.J.o.H. and Flow, F., "Characteristics of small-scale motions in a dual-plane jet flow", International Journal of Heat and Fluid Flow, Vol. 91, (2021), 108851, doi: 10.1016/j.ijheatfluidflow.2021.108851
  16. Singh, P., Grover, N.K., Agarwal, V., Sharma, S., Singh, J., Sadeghzadeh, M. and Issakhov, A.J.M.P.i.E., "Computational fluid dynamics analysis of impingement heat transfer in an inline array of multiple jets", Mathematical Problems in Engineering, Vol. 2021, (2021), doi: 10.1155/2021/6668942
  17. Pandey, K., Kumar, V.J.I.J.o.C.E. and Applications, "Cfd analysis of four jet flow at mach 1.74 with fluent software", International Journal of chemical engineering and applications,  Vol. 1, No. 4, (2010), 302, doi: 10.7763/IJCEA.2010.V1.53
  18. Zheng, X., Jian, X., Wei, J. and Wenzheng, D.J.I.J.o.A.E., "Numerical and experimental investigation of near-field mixing in parallel dual round jets", International Journal of Aerospace Engineering, Vol. 2016, (2016), doi: 10.1155/2016/7935101
  19. Boussoufi, M., Sabeur-Bendehina, A., El Ganaoui, M., Morsli, S. and Ouadha, A.J.E.P., "Numerical simulation of the flow field analysis in the mixing twin jets", Energy Procedia, Vol. 139, (2017), 161-166, doi: 10.1016/ j.egypro.2017.1.190
  20. Jafarmadar, S.J.I.J.o.E., "The effects of pressure difference in nozzle’s two phase flow on the quality of exhaust mixture", International Journal of Engineering-Transactions B: Applications, Vol. 26, No. 5, (2013), 553-562, doi: 10.5829/idosi.ije.2013.26.05b.12
  21. Shih, T.-H.J.C. and Fluids, "J. A new _< k-ε> eddy-viscosity model for high reynolds number turbulent flows-model development and validation", Computers and Fluids, Vol. 24, (1995), 227, doi: 10.1016/0045-7930(94)00032-T
  22. Baliga, B. and Patankar, S.J.N.H.T., "A new finite-element formulation for convection-diffusion problems", Vol. 3, No. 4, (1980), 393-409,
  23. Anderson, E.A. and Spall, R.E.J.J.F.E., "Experimental and numerical investigation of two-dimensional parallel jets", Journal of Fluids Engineering, Vol. 123, No. 2, (2001), 401-406, doi: 10.1115/1.1363701
  24. Lin, Y. and Sheu, M.J.A.j., "Interaction of parallel turbulent plane jets", AIAA Journal, Vol. 29, No. 9, (1991), 1372-1373, doi: 10.2514/3.10749