What type of drag is generated by the collision of airstreams creating eddy currents and turbulence?

The type of drag generated by the collision of airstreams, which creates eddy currents and turbulence, is referred to as interference drag. This form of drag occurs when different elements of an aircraft, such as the wings, fuselage, and other surfaces, interact with each other in a way that disrupts the smooth flow of air.

When these surfaces come into proximity, the airflow around one surface can influence the airflow around another, leading to increased turbulence and the formation of eddies. These disruptions add to the aerodynamic resistance experienced by the aircraft, resulting in interference drag. Understanding this concept is crucial for optimizing aircraft design and improving aerodynamic efficiency.