Adjustable interrogation window for 2D Particle Image Velocimetry (PIV)

In the 14th International Symposium on Particle Image Velocimetry ISPIV 2021, we present a novel approach to adjust shapes of the interrogation windows (IW) in Particle Image Velocimetry (PIV) measurements as a function of temporal and spatial local coherent motions. Lagrangian Coherent Structures (LCS) has been widely utilized to determine local flow boundaries. We propose using Finite-Time Lyapunov Exponent (FTLE) to quantify LCS separatrix boundaries (i.e. ridges) and adjust the interrogation window. We integrated the proposed method with a local optical flow PIV algorithm. Cite: "Ali Rahimi Khojasteh, Dominique Heitz, Yin Yang. Adjustable interrogation window for 2D PIV estimation based on local Lagrangian coherency. 14th International Symposium on Particle Image Velocimetry ISPIV 2021, Aug 2021, Chicago, United States. 7 p. hal-03316124v2" Paper download links: https://www.4d-ptv.com/ https://hal.inrae.fr/hal-03316124 https://scholar.google.com/citations?view_op=view_citationhl=enuser=uQQR0Z4AAAAJcitation_for_view=uQQR0Z4AAAAJ:kNdYIx-mwKoC https://www.iit.edu/ispiv2021 #PIV #flowmeasurement #Optical_flow #Turbulence

• #فناوری_و_رایانه
• #آیرودینامیک
• #piv
• #particle_image_velocimetry
• #تونل_باد
• #آزمایش_آیرودینامیک