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The characteristics of the flow fields in a rectangular channel equipped with cylindrical ribs were examined through the Particle Image Velocimetry (PIV) experiments. The mean and turbulence characteristics were presented for three different Reynolds numbers of 2900, 8400 and 15000. In addition, the coherent flow structures were extracted by means of the Proper Orthogonal Decomposition (POD) method. The flow field is characterized by a large recirculation region and a secondary clockwise-rotating corner vortex. The high vorticity, fluctuation velocity and shear stress contours are formed along the free shear layers emanating from the upstream rib. As Reynolds numbers increase, the positive vorticity contours extend downstream and fluctuation velocity and shear stress contours spread out towards the channel wall. The POD results have shown that a horizontally aligned co-rotating vortex pair and a corner vortex are the dominant flow structures for the highest Reynolds number.
PAPER REVISED: 2017-09-27
PAPER ACCEPTED: 2017-09-29
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  1. Tauscher, R., Mayinger, F., Heat Transfer Enhancement in a Plate Heat Exchanger with Rib-Roughened Surfaces, in: Heat Transfer Enhancement of Heat Exchangers, (Eds. S. Kakaç, A.E. Bergles, F. Mayinger, H. Yüncü), Kluwer Academic Publishers, 1999, pp. 207-221.
  2. Verma, S.K., Prasad, B.N., Investigation for the Optimal Thermohydraulic Performance of Artificially Roughened Solar Air Heaters, Renewable Energy, 20 (2000), pp. 19-36
  3. Son, S.Y., Kihm, K.D., Han, J.C., PIV Flow Measurements for Heat Transfer Characterization in two-pass Square Channels with Smooth and 900 Ribbed Walls, Int. J. Heat Mass Transfer, 45 (2002), pp. 4809-4822
  4. Sivasankaran, H., Asirvatham, G., Bose, J., Albert, B., Experimental Analysis of Parallel Plate and Crosscut Pin Fin Heat Sinks for Electronic Cooling Applications, Thermal Science, 14 (2010), 1, pp. 147-156
  5. Keshmiri, A., Three-dimensional Simulation of a Simplified Advanced Gas-cooled Reactor Fuel Element, Nuclear Engineering and Design, 241 (2011), pp. 4122-4135
  6. Lorenz, S., Mukomilow, D., Leiner, W., Distribution of the Heat Transfer Coefficient in a Channel with Periodic Transverse Grooves, Exp. Thermal and Fluid Science, 11 (1995), pp. 234-242
  7. Han, J.C., Park, J.S., Developing Heat Transfer in Rectangular Channels with Rib Turbulators, Int. J. Heat Mass Transfer, 31 (1988), pp. 183-195
  8. Yang, K., Large Eddy Simulation of Turbulent Flows in Periodically Grooved Channel, J. Wind Engineering, 84 (2000), pp. 47-64
  9. Cui, J., Patel, V.C., Lin, C., Large-Eddy Simulation of Turbulent Flow in a Channel with Rib Roughness, Int. J. Heat and Fluid Flow, 24 (2003), pp. 372-388
  10. Casarsa, L., Arts, T., Experimental Investigation of the Aerothermal Performance of a High Blockage Rib-Roughened Cooling Channel, ASME J. Turbomachinery, 127 (2005), pp. 580-588
  11. Hyun, B.S., Suh, E.J., Kim, T.Y., Turbulent Flow Over Two-Dimensional Rectangular-Shaped Roughness Elements with Various Spacings, Proceedings, MTS/IEEE OCEANS Conference, Singapore, 2007, pp. 1-6
  12. Wang, L., Hejcik, J., Sunden, B., PIV Measurements of Separated Flow in a Square Channel with Streamwise Periodic Ribs on One Wall, ASME J. Fluids Engineering, 129 (2007), pp. 834-841
  13. Wang, L., Salewski, M., Sunden, B., Turbulent Flow in a Ribbed Channel: Flow Structures in the Vicinity of a Rib, Exp. Thermal and Fluid Science, 34 (2010), pp. 165-176
  14. Cardwell, N.D., Vlachos, P.P., Thole, K.A., Developing and Fully Developed Turbulent Flow in Ribbed Channels, Exp. Fluids, 50 (2011), pp. 1357-1371
  15. Coletti, F., Maurer, T., Arts, T., Sante, A., Flow Field Investigation in Rotating Rib-Roughened Channel by Means of Particle Image Velocimetry, Exp. Fluids, 52 (2012), pp. 1043-1061
  16. Varun, Saini, R.P., Singal, S.K., A Review on Roughness Geometry Used in Solar Air Heaters, Solar Energy, 81 (2007), pp. 1340-1350
  17. Tauscher, R., Mayinger, F., Enhancement of Heat Transfer in a Plate Heat Changer by Turbulence Promotors, in: Compact Heat Exchangers for the Process Industries, (Ed. R.K. Shah), Begell House, New York, 1997, pp. 253-260
  18. Kilicaslan, I. and Sarac, H. I., Enhancement of Heat Transfer in Compact Heat Exchanger by Different Type of Rib with Holographic Interferometry, Exp. Thermal and Fluid Science, 17 (1998), pp. 339-346
  19. Chaube, A., Sahoo, P.K., Solanki S.C., Analysis of Heat Transfer Augmentation and Flow Characteristics Due to Rib Roughness Over Absorber Plate of a Solar Air Heater, Renewable Energy, 31 (2006), pp. 317-331
  20. Wongcharee, K., Changcharoen, W., Eiamsa-ard, S., Numerical Investigation of Flow Friction and Heat Transfer in a Channel with Various Shaped Ribs Mounted on Two Opposite Ribbed Walls, Int. J. Chem. Reactor Eng., 9 (2011), pp. 1-22
  21. Chung, H.S., Lee, G.H., Nine, M.J., Bae, K., Jeong, H.M., Study on the Thermal and Flow Characteristics on the Periodically Arranged Semi-Circular Ribs in a Rectangular Channel, Exp. Heat Transfer, 27 (2014), pp. 56-71
  22. Luo, L., Wen, F., Wang, L., Sunden, B., Wang, S., Thermal Enhancement by Using Grooves and Ribs Combined with Delta-Winglet Vortex Generator in a Solar Receiver Heat Exchanger, Applied Energy, 183 (2016), pp. 1317-1332
  23. Alfarawi, S., Abdel-Moneim, S.A., Bodalal, A., Experimental Investigations of Heat Transfer Enhancement from Rectangular Duct Roughened by Hybrid Ribs, I. J. Thermal Sciences, 118 (2017), pp. 123-138
  24. Jimenez, J., Turbulent Flows Over Rough Walls, Annu. Rev. Fluid Mech, 36 (2014), pp. 173-195
  25. Lo, K.H., Zare-Behtash, H., Kontis, K., Control of Flow Seperation on a Bump by Jets in a Mach 1.9 Free-Stream: An Experimental Study, Acta Astronautica 126 (2016), pp. 229-242
  26. Lumley, J.L., The Structure of Inhomogeneous Turbulent Flows, in: Atmospheric Turbulence and Radio Wave Propagation, (Eds. A.M. Yaglom, V.I. Tatarsky), Nauka Publishing House, Moscow, 1967, pp. 166-178
  27. Sirovich, L., Turbulence and the Dynamics of Coherent Structures. Part I: Coherent Structures, Quart. Appl. Math., 45 (1987), 3, pp. 561-571
  28. Dynamic Studio User's Guide, Publication No. 9040U1859, Dantec Dynamics: Skovlunde, Denmark, 2015
  29. Prasad, B.N., Saini, J.S., Effect of artificial roughness on heat transfer and friction factor in a solar air heater, Solar Energy, 41(1988), pp. 555-560.

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