PIV VELOCITY-MEASUREMENTS CLOSE TO A BLUFF-BODY

PIV (Particle Image Velocimetry) is a recently developed technique, wh ich makes it possible to obtain velocity information about the particl es seedings a fluid and belonging to a plane illuminated by means of a light sheet. PIV offers the advantages of flow visualization together with the possibility of determining a quantitative picture of the flo w field. The technique is used for the study of the velocity field nea r an obstacle placed on the lateral wall of a circular cylinder, fille d with water, whose base rotates at constant angular velocity.