Department of Mechanical Engineering, University of Bari, Metropolitan City of Bari, Italy.
Research Article
World Journal of Advanced Research and Reviews, 2023, 19(01), 093-100
Article DOI: 10.30574/wjarr.2023.19.1.1283
Received on 22 May 2023; revised on 02 July 2023; accepted on 04 July 2023
This research delves into an examination of the potential reduction in friction drag within turbulent channel flow through the implementation of superhydrophobic surfaces. The focus lies on considering the effect of the hydrophobic surface as a slip boundary condition along the wall. Consequently, this newly introduced boundary condition becomes an integral part of the Large Eddy Simulation (LES) equations. The projected outcome suggests a substantial drag reduction of approximately 15% at Re = 5000-8000 and enhanced heat transfer by 20%, aligning harmoniously with the findings derived from Direct Numerical Simulation (DNS). Significantly, this discovery holds implications regarding the modification of near-wall turbulence structures through the introduction of streamwise slip velocity. Moreover, it becomes evident that the turbulence structure experiences a discernible transformation when the slip length exceeds a specific threshold value.
Hydrophobicity; Drag Reduction; Heat Transfer; Large-Eddy Simulation
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Annalisa Mazzanti, Domenica Costa and Santo Caruso. Drag and heat transfer effect of grooved hydrophobic bluff bodies. World Journal of Advanced Research and Reviews, 2023, 19(1), 093-100. Article DOI: https://doi.org/10.30574/wjarr.2023.19.1.1283