Dimples for Skin-Friction Drag Reduction: Status and Perspectives

Dimples for Skin-Friction Drag Reduction: Status and Perspectives

Blog Article

Dimples are small concavities imprinted on a flat surface, known to affect heat transfer and also flow separation and aerodynamic drag on bluff bodies when acting as a standard roughness.Recently, dimples have been proposed as a roughness pattern that is capable of reducing the turbulent drag Colour Laser of a flat plate by providing a reduction of skin friction that compensates the dimple-induced pressure drag and leads to a global benefit.The question whether dimples do actually work to reduce friction drag is still unsettled.

In this paper, we provide a comprehensive review of the available information, touching upon the many parameters that characterize the problem.A number of reasons that contribute to explaining the contrasting literature information are discussed.We also provide guidelines for future studies by highlighting Wet key methodological steps required for a meaningful comparison between a flat and dimpled surface in view of drag reduction.