Drag Reduction in Turbulent Flows, 2nd Edition

Dear Colleagues,

In recent years, concerns over environmental pollution have become one of the main issues for the world’s governments, which are forcing manufacturers to reduce the environmental impact of their products. Aviation, automotive, nautical, and other industries are involved in a significant effort to achieve the objective of reducing pollutant emissions, thus also leading to economic benefits. In the aviation sector, the reduction in pollutant emissions is clearly linked to the aerodynamic efficiency of aircrafts; this has led to an increasing interest in drag reduction, which has become a keyword for next-generation aircrafts and for lifting bodies in general. The scientific community is involved in the research of new technologies or in the improvement of well-known drag reduction techniques. Reductions in aerodynamic and fluid dynamic drag can be attained through basic mechanisms such as the control of separation, the control of transition, and a reduction in skin friction in the turbulent flow region. There are two categories of devices that are able to initiate the drag reduction mechanism: active and passive devices. Active devices usually involve a moving surface, such as oscillating walls or micro-actuators, and require an energy input. Passive devices are more appealing because they do not require energy input or natural laminar flow (NLF) control, and riblets are probably the most interesting passive drag reduction technique in the aeronautical field. Polymers, surfactants, and super hydrophobic surfaces are very appealing in marine engineering. The scope of this Special Issue of Fluids covers all theoretical, analytical, computational, and experimental studies concerning drag reduction in turbulent flows. Applications of drag reduction techniques in different industrial fields, such as aerospace, automotive, marine engineering, and others, are welcome. Research on and applications of recent developments in the manufacturing of drag reduction devices are also encouraged.

Dr. Benedetto Mele
Guest Editor

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• drag reduction
• boundary layer control
• turbulence
• aerodynamics
• fuel consumption reduction
• aviation
• automotive
• nautical

• Drag Reduction in Turbulent Flows in Fluids (8 articles)