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Author(s): Zibo Ren, Shuhong Liu, Beng Hau Tan, Fabian Denner, Fabien Evrard, Berend van Wachem, Zhigang Zuo, and Claus-Dieter Ohl Surface attached micro- and nanobubbles are long-lived gaseous domains which are remarkably difficult to move or destroy. By creating a localized shear flow of sufficient shear rate from jets of cavitation bubbles, we observe that surface attached micro- and nanobubbles form long gaseous tethers, leading to the pinch...

Author(s): Nathanaël Machicoane and Romain Volk In inhomogeneous turbulent flows particles whose size are close to the flow integral length scale do not sample the flow homogeneously. Instead they explore preferentially regions of low velocity fluctuations. We study how this preferential sampling becomes more and more accentuated when the flow fluctuations decrease as the Reynolds number is lowered. In the absence of fluctuations, the large particles...

Author(s): Davi B. de Souza, Rômulo B. Freitas, and Leonardo S. de B. Alves An inviscid and planar mixing-layer analogy has been recently developed to qualitatively identify the transverse jet transition from convectively to absolutely unstable. We have shown that introducing Reynolds number effects on the disturbance behavior as well as evaluating the entire problem in cylindrical instead of Cartesian coordinates leads to significant improvements...

Author(s): Petr Hellinger, Andrea Verdini, Simone Landi, Emanuele Papini, Luca Franci, and Lorenzo Matteini Compressible isotropic spectral transfer and Karman-Howarth-Monin equations equivalently quantify different processes in weakly and moderately compressible direct simulations of decaying hydrodynamic turbulence with moderate Reynolds numbers. The simulation results show that pressure dilatation does not lead to a net exchange between the...

Author(s): Lige Zhang, Tejaswi Soori, Arif Rokoni, Allison Kaminski, and Ying Sun Drop impact with a smooth surface can produce a dimple mode of contact due to a combined effect of a capillary wave and a thin film instability. [Phys. Rev. Fluids 6, 044002] Published Mon Apr 12, 2021

Author(s): B. Ling, C. B. Rizzo, I. Battiato, and F. P. J. de Barros We develop a semi-analytical solution based on integral transforms (GITT) that can be employed to predict macroscopic transport in channel-matrix shear flows in a computationally efficient manner. We further demonstrate that the newly developed solution enables real-time macroscale concentration estimation in relevant applications. [Phys. Rev. Fluids 6, 044501] Published Mon...

Author(s): Alain D. Gervais, Quinlan Ede, Gordon E. Swaters, Ton S. van den Bremer, and Bruce R. Sutherland Simulations of fully localized internal gravity wave packets with their induced mean flow superimposed reveal that waves overturn even for initial amplitudes significantly lower than the critical amplitudes predicted by linear theory, in contrast with previous results of one- and two-dimensional wave packets without rotation. [Phys. Rev...