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Lab Adds Particle Image Velocimetry (PIV) System

The Experimental Fluid Dynamics Laboratory (EFDL) acquired a 2-D Particle Image Velocimetry (PIV) system during the summer of 2019. PIV is a non-intrusive, optical measurement technique that provides instantaneous velocity fields. The PIV technique has numerous applications in fundamental and industrial fluids research, wind tunnel testing, biofluids research, airfoil aerodynamics, studying flow over automobiles and trucks, and validation of computational flow simulations.

For PIV measurements, the displacement of atomized particles in a flow is illuminated using a pulse laser system. The images of scattered light from the particles are recorded using a high-sensitivity double-frame CCD camera. The consecutively recorded images are used to track the displacement of the atomized particles and estimate the velocity vector for the studied flow. Figure 1 shows a typical PIV image, this experiment was performed in the EFDL to study the aerodynamics of a flexible airfoil in a uniform jet flow.

Mechanical engineering graduate student Rodrigo Padilla compiles lift and drag measurements using the new PIV system that allows users to visualize particles around a moving membrane
Mechanical engineering graduate student Rodrigo Padilla compiles lift and drag measurements using the new PIV system that allows users to visualize particles around a moving membrane.
Particles around a moving membrane
Screenshot showing particles around a moving membrane.

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