CFD approach to resistance prediction as a function of roughness

Yigit Kemal Demirel, Mahdi Khorasanchi, Osman Turan, Atilla Incecik

Research output: Contribution to conferencePaperpeer-review


This paper aims to present a CFD approach to predict the resistance as a function of surface roughness by performing CFD simulations of towing tests of coated flat plates. Following a brief description of roughness and the roughness effect on flow and the turbulent boundary layer, the methodology of determination of the most suitable roughness function model to be used in the software is discussed in details. Next, the CFD approaches to represent smooth and rough velocity profile are presented . Finally, a new roughness function model is suggested and employed in the CFD software while a case study is performed to obtain the frictional resistance coefficients (CF ) of coated flat plates using the modified CFD approach. The results of the new approach show a very good agreement with the experimental data and it is shown that the new approach is able to predict the resistance of ship coatings as a function of roughness height.
Original languageEnglish
Number of pages10
Publication statusPublished - 17 Apr 2014
EventTransport Research Arena 2014 - La Défense CNIT, Paris, France
Duration: 14 Apr 201417 Apr 2014


ConferenceTransport Research Arena 2014


  • computational fluid dynamics (CFD)
  • roughness
  • resistance
  • ship coating


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