Particle Image Velocimetry (PIV) is widely acknowledged as the leading flow measurement technique in experimental fluid mechanics. Its working principle is based on the indirect evaluation of the flow velocity by measuring the displacement of small particles inserted into the flow and carried by the fluid. These tracer particles are illuminated by a light source, typically a laser, and their position is recorded by digital cameras.
The introduction of digital PIV in the early 1990s has greatly contributed to enhance the understanding of turbulent and complex flows. Recent advances of the technique include the possibility of measuring the flow field in three-dimensional volumes, which can be efficiently achieved in particular by tracking the position of individual tracer particles in successive time instants (Lagrangian Particle Tracking, LPT). The availability of the velocity and acceleration of fluid elements in a three-dimensional domain also enables the determination of flow pressure and aerodynamic loads (using e.g. data assimilation methods), which is highly relevant for the design of new aerodynamic systems.
The SIG 32 “Particle Image Velocimetry” focuses on the developments and applications of particle-image based flow measurement techniques intended in broad sense, including both the conventional cross-correlation based approach (PIV) and Lagrangian Particle Tracking. The SIG 32 aims at bringing together researchers and users of PIV and LPT to:
The activities of the SIG 32 will involve workshops on specific aspects of PIV and LPT as well as a wide range of applications. Additionally, challenges will be organized where the participants will compete to define the best approaches for image evaluation and data processing. Examples of the workshops topics include:
|Topic||Connection to other SIG’s|
|Loads and pressure determination form PIV||SIG20 "Drag reduction and flow control"|
|PIV uncertainty quantification||SIG45 “Uncertainty Quantification in Industrial Analysis and Design|
|Large-scale PIV for industrial applications||SIG45 “Uncertainty Quantification in Industrial Analysis and Design|
|Experimental validation of numerical simulations||SIG1 “Large Eddy Simulation”|
SIG15 “Turbulence Modelling”
|PIV for complex and separated flows||SIG36 “Swirling flows”|
SIG47 “3D Wakes”
|PIV for aeroacoustics||SIG39 “Aeroacoustics”|
|Experimental approaches for fluid-structure interaction||SIG41 “Fluid-structure interaction|
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