Reynolds stress tensor and pressure-related turbulence transport terms measured by time-resolved tomographic-PIV

Turbulence is inherently a three-dimensional and time dependent flow phenomenon (Pope, 2001). Because of the ubiquitous existence turbulent flows in nature, accurate characterization flows, either through experimental measurements or direct numerical simulations, paramount importance for modeling turbulence (Liu Katz, 2018). Since its inception 1984 (Adrian, 1984), Particle Image Velocimetry (PIV), among several other conventional techniques used measurements, has been valuable tool providing reliable data research. Several advancements hardware such as high-speed cameras, together with innovative algorithms procedures, have extended scope PIV to variety applications. Westerweel et al. (2013) point out recent review article that one main advantages measurement unique ability measuring quantitatively spatial derivatives field. With development Tomographic introduced by Elsinga (2006), it now possible measure simultaneously distributions three velocity components field, thus enabling us all flow. However, thorough flow, addition gradients, instantaneous pressure distribution 3D field also needs be measured.