Numerical Investigation of Drag Reduction Mechanism in Laminar Flow Regime using Rectangular Riblets

Document Type : مقاله کوتاه

Authors

• Amir Haji Khan Mirzaei
• Alireza Raoufpanah

Islamic Azad University, Yadegar-e-Imam Khomeini (rah) Branch‎

10.22067/fum-mech.v31i1.79677

Abstract

This paper aims to introduce an efficient and passive method in order to reduce the amount of drag exerted on the surfaces of the objects moving in the water. The flow regime is considered as laminar. The desired method is to use rectangular riblets being perpendicular to the flow direction. Two-dimensional computational fluid dynamics is utilized to resolve the flow field around the ribbed surfaces. The effects of geometrical parameters of riblets including width and height as well as free-stream velocity on the amount of drag reduction are numerically calculated. The numerical results certify the efficiency of rectangular riblets as a drag reduction tool in the laminar flow regime. Maximum amount of the drag reduction is about 8.7% achieved for the riblets width of 0.1 millimeter and at free-stream velocity of 10 m/s.

Keywords

• Riblet
• ‎, Hyrophobic
• Drag reduction
• Numerical simulation‎
• computational fluid dynamics

---

References

Walsh, M.J., "Riblets as a viscous drag reduction technique", AIAA Journal, Vol. 21, pp. 485–486, (1983).

2. Walsh, M. and Lindemann, A., "Optimization and application of riblets for turbulent drag reduction", In: 22nd Aerospace Science Meeting, p. 347, (1984).

3. Rowin, W.A., Hou, J. and Ghaemi, S., "Turbulent channel flow over riblets with superhydrophobic coating", Experimental Thermal and Fluid Science, Vol. 94, pp. 192–204, (2018).

4. Min, T. and Kim, J., "Effects of hydrophobic surface on skin-friction drag", Physics of Fluids, Vol. 16, pp. L55–L58, (2004).

5. Raoufpanah, A., Rad, M. and Nouri, B.A., "Effects of slip condition on the characteristic of flow in ice melting process", International Journal of Engineering, Vol. 18, pp. 253–261, (2005).

6. Voronov, R.S., Papavassiliou, D.V. and Lee, L.L., "Slip length and contact angle over hydrophobic surfaces", Chemical Physics Letters, Vol. 441, pp. 273–276, (2007).

7. Fu, Y.F., Yuan, C.Q. and Bai, X.Q., "Marine drag reduction of shark skin inspired riblet surfaces", Biosurface and Biotribology, Vol. 3, pp. 11–24, (2017).

8. Suzuki, Y. and Kasagi, N., "Turbulent drag reduction mechanism above a riblet surface", AIAA Journal, Vol. 32, pp. 1781–1790, (1994).

9. Kramer, F., Grüneberger, R., Thiele, F., Wassen, E., Hage, W. and Meyer, R., "Wavy riblets for turbulent drag reduction", In: 5th Flow Control Conference, p. 4583, (2010).

10. Sareen, A., Deters, R.W., Henry, S.P. and Selig, M.S., "Drag reduction using riblet film applied to airfoils for wind turbines", Journal of Solar Energy Engineering, Vol. 136, pp. 21007, (2014).

11. Hou, J., Hokmabad, B.V. and Ghaemi, S., "Three-dimensional measurement of turbulent flow over a riblet surface", Experimental and Thermal Fluid Science, Vol. 85, pp. 229–239, (2017).

12. Ahmmed, K.M.T., Montagut, J. and Kietzig, A., "Drag on superhydrophobic sharkskin inspired surface in a closed channel turbulent flow", Canadian Journal of Chemical Engineering, Vol. 95, pp. 1934–1942, (2017).

13. Choi, H., Moin, P. and Kim, J., "Direct numerical simulation of turbulent flow over riblets", Journal of Fluid Mechanics, Vol. 255, pp. 503–539, (1993).

14. Huang, C., Wang, Q., Wei, J. and Yu, B., "Direct numerical simulation of turbulent flow over wide‐rib rectangular grooves", Canadian Journal of Chemical Engineering, Vol. 96, pp. 1207–1220, (2018).

15. Huang, C., Liu, D., Wei, J., Yu, B., Zhang, H. and Cheng, J., "Direct numerical simulation of surfactant solution flow in the wide‐rib rectangular grooved channel", AIChE Journal, Vol. 64, pp. 2898–2912, (2018).

16. Sasamori, M., Iihama, O., Mamori, H., Iwamoto, K. and Murata, A., "Parametric study on a sinusoidal riblet for drag reduction by direct numerical simulation", Flow, Turbulence and Combustion, Vol. 99, pp. 47–69, (2017).

17. Fuaad, P.A. and Prakash, K.A., "Enhanced drag-reduction over superhydrophobic surfaces with sinusoidal textures: A DNS study", Computers and Fluids, (2019).

18. Klumpp, S., Meinke, M. and Schröder, W., "Numerical simulation of riblet controlled spatial transition in a zero-pressure-gradient boundary layer", Flow, Turbulence and Combustion, Vol. 85, pp. 57–71, (2010).

19. Bai, X., Zhang, X. and Yuan, C., "Numerical analysis of drag reduction performance of different shaped riblet surfaces", Marine Technology Society Journal, Vol. 50, pp. 62–72, (2016).

20. Byun, D. and Park, H.C., "Drag reduction on micro-structured super-hydrophobic surface", In: Robot. Biomimetics, pp. 818–823, (2006).

21. Zhang, Y., Chen, H., Fu, S. and Dong, W., "Numerical study of an airfoil with riblets installed based on large eddy simulation", Aerospace Science and Technology, Vol. 78, pp. 661–670, (2018).

22. Boomsma, A. and Sotiropoulos, F., "Riblet drag reduction in mild adverse pressure gradients: a numerical investigation", International Journal of Heat and Fluid Flow, Vol. 56, pp. 251–260, (2015).