Drag Reduction by Using the Microriblet of Sawtooth and Scalloped Types

Alireza Heidarian¹, Hassan Ghassemi^2, and Pengfei Liu³

¹Department of Marine Engineering, Persian Gulf University, Boushehr, Iran

²Department of Maritime Engineering, Amirkabir University of Technology, Tehran, Iran

³Australian Maritime College, University of Tasmania, Locked bag 1395, Launceston, TAS 7250, Australia & International School of Ocean Science and Engineering, Harbin Institute of Technology, Weihai, 264200, China

Cite this paper:
Alireza Heidarian, Hassan Ghassemi and Pengfei Liu. Drag Reduction by Using the Microriblet of Sawtooth and Scalloped Types. International Journal of Physics. 2018; 6(3):93-98. doi: 10.12691/ijp-6-3-5

Abstract

Nowadays, considering the importance of the drag reduction and increasing the speed is demand of all owners. In the field of marine industry, there should be an ongoing attempt to reduce fuel consumption of the marine vehicles. In this research, nature has been used as a guide to reach our target. Study of the skin of the fast marine’s faunas such as sharks and dolphins has generated the idea of riblet covered surfaces. Two various types of the riblets surfaces (sawtooth and scalloped) which are studied in this research. The microriblets are applied on the flat plate and investigated the effects on hydrodynamics parameters through the computational fluid dynamics method in ANSYS CFX. The results have been validated with the experimental results. By comparing the drag coefficient of simple flat plate with riblet one, it is concluded that riblets diminish drag force about 11% and raise lift about 6 % relative to the simple flat plate.

Keywords:
drag reduction micro riblet computational fluid dynamics lift force

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