On the noise in statistics of PIV measurements
Sign Up to like & getrecommendations! Published in 2021 at "Experiments in Fluids"
DOI: 10.1007/s00348-021-03163-1
Abstract: It is argued herein that when PIV is used to measure turbulence, it can be treated as a time-dependent signal. The `output' velocity consists of three primary contributions: the time-dependent velocity, a noise arising from… read more here.
Keywords: velocity; interrogation; piv measurements; statistics piv ... See more keywords
Stereoscopic PIV measurements of flow over a riblet surface at high Reynolds number
Sign Up to like & getrecommendations! Published in 2020 at "Experimental Thermal and Fluid Science"
DOI: 10.1016/j.expthermflusci.2020.110246
Abstract: Abstract The effect of drag reducing riblets on the flow structure was examined experimentally for a turbulent boundary layer at Reθ = 9890 and riblet spacing s+ = 13.4. Trapezoidal riblets were used, which were attached to… read more here.
Keywords: stereoscopic piv; surface; piv measurements; riblet ... See more keywords
Uncertainty analysis of PIV measurements in bubbly flows considering sampling and bubble effects with ray optics modeling
Sign Up to like & getrecommendations! Published in 2020 at "Nuclear Engineering and Design"
DOI: 10.1016/j.nucengdes.2020.110677
Abstract: Abstract In this paper, a modeling-based approach is developed to investigate the external sources of uncertainty in particle image velocimetry (PIV) measurements for two-phase bubbly flows. Primarily relied on ray optics modeling, this study focuses… read more here.
Keywords: uncertainty; optics; piv; optics modeling ... See more keywords
Turbulent kinetic energy budget in a wall-mounted cylinder wake using PIV measurements
Sign Up to like & getrecommendations! Published in 2020 at "Ocean Engineering"
DOI: 10.1016/j.oceaneng.2020.107582
Abstract: Abstract In high flow velocity areas, turbulence intensity is high and flow variations may have a major impact on tidal turbines behaviour. Previous studies show that a square wall-mounted cylinder produces a very extended and… read more here.
Keywords: energy; wall mounted; mounted cylinder; piv measurements ... See more keywords
Particle-resolved simulations of catalytic fixed bed reactors: Comparison of turbulence models, LES and PIV measurements
Sign Up to like & getrecommendations! Published in 2020 at "Powder Technology"
DOI: 10.1016/j.powtec.2019.05.012
Abstract: Abstract Particle-resolved CFD simulations are widely used for the predictions of particle-scale flow, transport processes and chemical reactions. However, the effect of turbulence models used in such simulations is not quantitatively established. In the present… read more here.
Keywords: turbulence; based models; piv measurements; particle resolved ... See more keywords
PIV measurements in near-wake turbulent regions
Sign Up to like & getrecommendations! Published in 2018 at "Modern Physics Letters B"
DOI: 10.1142/s0217984918400262
Abstract: Particle image velocimetry (PIV) is a non-intrusive optical diagnostic and must be made of the seedings (foreign particles) instead of the fluid itself. However, reliable PIV measurement of turbule... read more here.
Keywords: near wake; wake turbulent; measurements near; turbulent regions ... See more keywords