Resources

Author(s): J. O. Oyero, J. J. Hidalgo, M. Dentz, and A. De Wit Buoyancy-driven instabilities strongly control mixing and reaction rates in stratified reactive fluids, yet how chemical reactions reshape the density field that drives these flows remains unclear. This work shows that a bimolecular reaction at a miscible interface can fundamentally alter density profiles, triggering convection even around initially stable stratifications and amplifying...

Author(s): Huzaif Rahim, Sudeshna Roy, and Thorsten Pöschel Granular materials composed of elongated particles exhibit morphological inhomogeneity under shear, driven by the interplay between particle alignment and dilatancy. Using discrete-element simulations in a linear split-bottom shear cell, we show how friction, particle shape, and initial packing conditions influence the steady-state surface morphology. Our results reveal that particle...

Author(s): Valentin Skoutnev, Aurélie Astoul, and Adrian J. Barker Inertial waves transport energy and momentum in rotating fluids, impacting mixing and tidal dissipation in Earth’s oceans, gaseous planets, and stellar interiors. This study examines the linear stability and nonlinear breakdown of finite-amplitude propagating plane inertial waves. We use numerical simulations to validate the frequency-dependent anisotropy of the most unstable perturbations...

Author(s): Md Mainul Islam, Seyed Mojtaba Tabarhoseini, Nicole Miller, Yu-Hsiang Lee, Aimee Sayster, Joshua B. Bostwick, Yuhao Xu, and Xiangchun Xuan We investigate the influences of fluid shear thinning and shear thinning gradients on electrokinetic instability (EKI) in microchannel flows with conductivity gradients via the addition of xanthan gum (XG) polymer. We also perform a scaling analysis to account for the fluid shear thinning effect...

Author(s): Jake Buzhardt and Michael D. Graham Controlling fluid flows to induce laminarization is a challenging task due to the chaotic nature of turbulent flows. We introduce the “minimal seed for relaminarization”: the smallest perturbation of a turbulent state that triggers laminarization without a chaotic transient. This minimal seed and its trajectory provide an efficient laminarization pathway out of the turbulent region of the state space...

Author(s): Kennedy Nexon Chagua Encarnación, Antoine Seguin, and Baptiste Darbois Texier Collisions between grains in dense granular flows give rise to diffusive-like particle trajectories. Here, we extend this framework beyond spherical grains by experimentally investigating the dynamics of individual semi-rigid fibers immersed in an index-matched granular flow. We systematically examine the effects of fiber length, diameter, grain size, and...

Author(s): Nicola Savelli, Ali R. Khojasteh, Abel-John Buchner, Jerry Westerweel, and Willem van de Water The Josephson-Anderson relation was originally conceived to understand drag in quantum fluids in which vorticity is quantized. Surprisingly, it also explains drag in classical fluids when vorticity is constantly being generated. Drag ensues when vortices cross the streamlines of the background potential flow. [Phys. Rev. Fluids 11, 024701...