Numerical and experimental investigation of impinging turbulent flow of twin jets against a wall

Document Type : Article

Authors

1 Department of Mechanical Engineering, Tarbiat Modares University, Tehran, P.O. Box 1411713116, Iran.

2 Department of Mechanical Engineering, Foolad Institute of Technology, Fooladshahr, Isfahan, P.O. Box 8491663763, Iran.

3 Department of Mechanical Engineering, University of Ayatollah Ozma Boroujerdy, Boroujerd, P.O. Box 6919969411, Iran.

4 LAMIH, CNRS UMR 8201, University of Valenciennes and Hainaut-Cambresis (UVHC), Campus Mont Houy, Building Gromaire, F-59313, Valenciennes Cedex 9, France.

5 TSI France, Hotel Technologique, Technop^ole de Ch^ateau-Gombert, 13382 Marseille, France.

6 rue de la houssiniere BP 92208, 44322 Nantes Cedex 03, France.

Abstract

In the present study, impinging of vertical twin jet against a horizontal plate is numerically and experimentally investigated. Four two equation RANS based turbulence models are used and their capabilities to simulate such complicated turbulent flow were examined. The two fluid jets are separated by a thin membrane. The inlet jet hydraulic diameters are the same and the Reynolds number of external flows of jets is 13500. The ratio of width of nozzles (e) to nozzle-to-plate distance (H) considered as 1:10. The turbulent models used in this work are k-ε, k-ε RNG, k-ω and k-ω SST. The results obtained by the models were compared with each other as well as two-dimensional PIV data to evaluate the capabilities of such models for this kind of flows. By comparing the numerical and experimental results, it is concluded that all of the models can predict acceptable results in the free jet area, but in the near wall region none of the models can predict flow characteristics with reasonable accuracy. It was observed that, at low nozzle-to-plate distances, the prediction results of the turbulence models are approximately in accordance with the experimental data, particularly for a zone near the midline separating the two jets.

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References

References:
1. Greco, C., Castrillo, G., Crispo, C., Astarita, T., and Cardone, G. "Investigation of impinging single and twin circular synthetic jets  flow field", Experimental Thermal and Fluid Science, 74, pp. 354-367 (2016).
2. Ozmen, Y. "Confined impinging twin air jets at high Reynolds numbers", Experimental Thermal and Fluid Science, 35, pp. 355-363 (2011).
3. Loubiere, K. and Pavageau, M. "Educing coherent eddy structures in air curtain systems", Chemical Engineering and Processing: Process Intensification, 47, pp. 435-448 (2008).
4. Felis, F., Pavageau, M., Elicer-Cortes, J.C., and Dassonville, T. "Simultaneous measurements of temperature and velocity  uctuations in a double streamtwin jet air curtain for heat confinement in case of tunnel fire", International Communications in Heat and Mass Transfer, 37, pp. 1191-1196 (2010).
5. Fernandez, J., Elicer-Cortes, J.C., Valencia, A., Pavageau, M., and Gupta, S. "Comparison of low-cost two-equation turbulence models for prediction  flow dynamics in twin-jets devices", International Communications in Heat and Mass Transfer, 34, pp. 570-578 (2007).
6. Lecaros, M., Elicer-Cortes, J.C., Fuentes, A., and Felis, F. "On the ability of twin jets air curtains to confine heat and mass inside tunnels", International Communications in Heat and Mass Transfer, 37, pp. 970-977 (2010).
7. Taghinia, J., Rahman, M.M., and Siikonen, T. "Numerical investigation of twin-jet impingement with hybrid-type turbulence modeling", Applied Thermal Engineering, 73, pp. 650-659 (2014).
8. Greco, C.S., Ianiro, A., and Cardone, G. "Time and phase average heat transfer in single and twin circular synthetic impinging air jets", International Journal of Heat and Mass Transfer, 73, pp. 776-788 (2014).
9. Elicer-Cortes, J.C., Demarco, R., Valencia, A., and Pavageau, M. "Heat confinement in tunnels between two double-stream twin-jet air curtains", International Communications in Heat and Mass Transfer, 36, pp. 438-444 (2009).
10. Rivera, J., Elicer-Cortes, J.C., and Pavageau, M. "Turbulent heat and mass transfer through air curtains devices for the confinement of heat inside tunnels", International Communications in Heat and Mass Transfer, 38, pp. 688-695 (2011).
11. Charmiyan, M., Azimian, A., Keirsbulc, K.L., Shirani, E., and Aloui, F. "Turbulent plane impinging jetphysical insight and turbulence modeling", Journal of Applied Fluid Mechanics, 9, pp. 11-17 (2016).
12. Xu, L., Lan, J., Ma, Y.H., Gao, J.M., and Li, Y.L. "Numerical study on heat transfer by swirling impinging jets issuing from a screw-thread nozzle", International Journal of Heat and Mass Transfer, 115, pp. 232-237 (2017).
13. Draksler, M., Koncar, B., Cizelj, L., and Niceno, B. "Large eddy simulation of multiple impinging jets in hexagonal configuration- flow dynamics and heat transfer characteristics", International Journal of Heat and Mass Transfer, 109, pp. 16-27 (2017).
14. Trinh, X.T., Fenot, M., and Dorignac, E. "Flow and heat transfer of hot impinging jets issuing from lobed nozzles", International Journal of Heat and Fluid Flow, 67, pp. 185-201 (2017).
15. Tsaoulidis, D. and Angeli, P. "Liquid-liquid dispersions in intensified impinging-jets cells", Chemical Engineering Science, 171, pp. 149-159 (2017).
16. Charmiyan, M., Azimian, A.R., Shirani, E., Aloui, F., Degouet, C., and Michaelis, D. "3D tomographic PIV, POD and vortex identification of turbulent slot jet  flow impinging on a  at plate", International Journal of Mechanical Science and Technology, 31, pp. 5347-5357 (2017).
17. Charmiyan, M., Azimian, A.R., Shirani, E., and Aloui, F. "Capability assessment of five different RANS-based turbulence models to simulate the various regions of slot turbulent impingement jet  flow", In ASME 2017 Fluids Engineering Division Summer Meeting, p. V01BT11A011 (2017).
18. Chacon Rebollo, T. and Lewandowski, R., Mathematical and Numerical Foundations of Turbulence Models and Applications, Springer, pp. 1-517 (2014).
19. Van Leer, B. "Towards the ultimate conservative difference scheme. II. Monotonicity and conservation combined in a second-order scheme", Journal of Computational Physics, 14(4), pp. 361-370 (1974).
Scientia Iranica
Volume 26, Issue 6 - Serial Number 6
Transactions on Mechanical Engineering (B)
November and December 2019
Pages 3271-3282

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