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Author(s): K. Lüdemann and A. Tilgner Convection in a frame of reference rotating rapidly about an axis perpendicular to the direction of gravity is a model system for convection in the equatorial region of gaseous planets and is realized in recent laboratory experiments. It is found that the transition from rotationally constrained two-dimensional to three-dimensional flows in this system does not occur at some fixed Rossby number. Instead, the...

Author(s): C. Yepez, J. Naude, and F. Méndez In this work, we study the transport of surfactant molecules to the surface of an oscillating microbubble when an acoustic pressure is used as driving force to promote the nonlinear oscillation. We consider a dynamic surface tension as a function of the surfactant concentration and a large diffusive Péclet number, as occurs in several applications. The surfactant concentration equation is solvable by...

Author(s): Binglin Zeng (曾炳霖), Yuliang Wang (王玉亮), Christian Diddens, Harold J. W. Zandvliet, and Detlef Lohse The lifetime τ of an isothermal and purely diffusively dissolving droplet in a host liquid scales as τ∼R02 with its initial radius R0. Here we experimentally find and theoretically derive a completely different droplet dissolution behavior, resulting in τ∼R04. It occurs when the dissolution dynamics is controlled by local heating of the...

Author(s): Tatsuro Kishi, Takeshi Matsumoto, and Sadayoshi Toh We numerically investigate a two-time Lagrangian velocity correlation function for particle pairs in two-dimensional energy inverse-cascade turbulence. We propose a self-similar form of the correlation function via incomplete similarity and numerically verify it and determine the scaling exponents. Our results suggest a possibility not to recover the Richardson-Obukhov law at infinite...

Author(s): Kai Zhang and Md. Naimul Haque We quantify the mutual interaction effects between two parallel wakes caused by a mismatch in the size of a cylinder pair. [Phys. Rev. Fluids 7, 064703] Published Mon Jun 27, 2022

Author(s): W. Wang, F. Lin, X. Wei, J. Zou, and S. Dorbolo An antibubble is an uncommon fluid object with a unique structure: a liquid globule is wrapped by a thin air film, with the whole being immersed in a liquid bath. In short, the antibubble is the opposite of a soap bubble. The antibubble has been regarded as a promising candidate for various industri… [Phys. Rev. Fluids 7, L061601] Published Mon Jun 27, 2022

Author(s): Sofía Angriman, Pablo D. Mininni, and Pablo J. Cobelli Large-scale flow components are known to affect Lagrangian inertial-range turbulent statistics. Multitime structure functions are shown to be a powerful and robust tool to disentangle these contributions from tracers’ statistics in a turbulent von Kármán experiment, in Taylor-Green direct numerical simulations, and in isotropic and homogeneous turbulence. Multitime statistics also...