Latest papers in fluid mechanics
Author(s): Endao Han, Liang Zhao, Nigel Van Ha, S. Tonia Hsieh, Daniel B. Szyld, and Heinrich M. Jaeger
High-speed ultrasound imaging is used to reconstruct the three-dimensional flow field of dense cornstarch suspensions under tilted impact. Experiments show how jamming fronts propagate and get deformed in a nonaxisymmetric manner under different impact angles.
[Phys. Rev. Fluids 4, 063304] Published Fri Jun 21, 2019
Group theory analysis of early-time scale-dependent dynamics of the Rayleigh-Taylor instability with time varying acceleration
Author(s): Desmond L. Hill, Aklant K. Bhowmick, Dan V. Ilyin, and Snezhana I. Abarzhi
Group theory analysis of the Rayleigh-Taylor instability with an acceleration varying in time finds that the early time behavior depends on whether the acceleration decays faster or slower than 1/t2.
[Phys. Rev. Fluids 4, 063905] Published Fri Jun 21, 2019
Resonant response and optimal energy harvesting of an elastically mounted pitching and heaving hydrofoil
Author(s): Yunxing Su and Kenneth Breuer
Experiments using a cyber-physical hydrofoil, tested over a wide range of stiffness and damping coefficients, reveal that the optimal response is achieved at the structural resonant frequency where the leading-edge vortex formation is synchronized with the foil pithing and heaving.
[Phys. Rev. Fluids 4, 064701] Published Thu Jun 20, 2019
Author(s): Yayun Wang, Adam Sierakowski, and Andrea Prosperetti
Numerical simulations of turbulent flow past a sphere immersed in decaying turbulence, free to rotate around a fixed center, are presented. This arrangement allows the same simulations with and without the sphere, thus permitting the identification of the flow features that most affect the sphere rotation.
[Phys. Rev. Fluids 4, 064304] Published Wed Jun 19, 2019