Characterising Single and Two-Phase Homogeneous Isotropic Turbulence with Stagnation Points

It has been shown that, for dense, sub-Kolmogorov particles advected in a turbulent flow, carrier phase properties can be reconstructed from the particles’ velocity field. For instantaneous field used to detect stagnation points of phase. The Rice theorem therefore used, implying that Taylor length is proportional mean distance between such points. As this model only tested one-dimensional time signals, work discusses if it applied two-phase, three-dimensional flows. We use direct numerical simulations with Reynolds numbers Reλ 40 and 520 study particle-laden flows Stokes number St=0.5. confirm phase, proportionality coefficient depends weakly on Reλ. Then, we propose an interpolation scheme reconstruct results indicate cannot practice two-phase flows, as clustering forms very dense structures require large accurately sample flow