Variable-Timestep Shake-The-Box (VT-STB) for flows with high dynamic range

Abstract

In recent years, Lagrangian Particle Tracking (LPT) has become more and more important in the field of 3D flow measurements, largely due to the introduction of the methods of Iterative Particle Reconstruction (IPR, Wieneke 2013) and Shake-The-Box (STB, Schanz et al. 2016). Applying the STB algorithm, particles can be tracked in large numbers, with a nearly complete suppression of ghost particles. The introduced extension to the STB method extends its working range to flows with high vleocity range, i.e. large areas within the measurement region that exhibit very slow flow velocities compared to the fastest ones, which determine the applied frame-rate