Drag Reduction by Using the Microriblet of Sawtooth and Scalloped Types

Alireza Heidarian, Hassan Ghassemi, Pengfei Liu

Research output: Contribution to journalArticleResearch

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.
Original languageEnglish
Pages (from-to)93-98
Number of pages6
JournalInternational Journal of Physics
Volume6
Issue number3
DOIs
Publication statusPublished - 2018
Externally publishedYes

Keywords

  • drag reduction
  • micro riblet
  • computational fluid dynamics
  • lift force

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