Zobrazeno 1 - 10
of 450
pro vyhledávání: '"Bragg, A. D."'
Developing reduced order models for the transport of solid particles in turbulence typically requires a statistical description of the particle-turbulence interactions. In this work, we utilize a statistical framework to derive continuum equations fo
Externí odkaz:
http://arxiv.org/abs/2406.13680
In an important study, Maffioli et al. (J. Fluid Mech., Vol. 794 , 2016) used a scaling analysis to predict that in the weakly stratified flow regime $Fr_h\gg1$ ($Fr_h$ is the horizontal Froude number), the mixing coefficient $\Gamma$ (defined as the
Externí odkaz:
http://arxiv.org/abs/2402.10704
Publikováno v:
J. Fluid Mech. 987 (2024) A17
Tom et al.\ (J.\ Fluid Mech.\ 947, A7, 2022) investigated the impact of two-way coupling (2WC) on particle settling in turbulence. For the limited parameter choices explored, it was found that 2WC substantially enhances particle settling compared to
Externí odkaz:
http://arxiv.org/abs/2309.07762
Publikováno v:
J. Fluid Mech. 992 (2024) A10
Recently, direct numerical simulations (DNS) of stably stratified turbulence have shown that as the Prandtl number ($Pr$) is increased from 1 to 7, the mean turbulent potential energy dissipation rate (TPE-DR) drops dramatically, while the mean turbu
Externí odkaz:
http://arxiv.org/abs/2308.00518
Under the right circumstances, inertial particles (such as sand or dust) settling through the atmospheric boundary layer can experience a net enhancement in their average settling velocity due to their inertia. Since this enhancement arises due to th
Externí odkaz:
http://arxiv.org/abs/2307.13659
We use experiments to study the evolution of bubble clusters in a swarm of freely rising, deformable bubbles. A new machine learning-aided algorithm allows us to identify and track bubbles in clusters and measure the cluster lifetimes. The results in
Externí odkaz:
http://arxiv.org/abs/2306.02101
A generalized logarithmic law for high-order moments of passive scalars is proposed for turbulent boundary layers. This law is analogous to the generalized log law that has been proposed for high-order moments of the turbulent longitudinal velocity a
Externí odkaz:
http://arxiv.org/abs/2212.04987
We use experiments to explore the effect of surfactants on bubble-induced turbulence (BIT) at different scales, considering how the bubbles affect the flow kinetic energy, anisotropy and extreme events. To this end, high-resolution Particle Shadow Ve
Externí odkaz:
http://arxiv.org/abs/2212.03620
Transport equations for heavy inertial particles in turbulent boundary layers may be derived from an underlying phase-space probability density function (PDF) equation. These equations, however, are unclosed, and the standard closure approach is to u
Externí odkaz:
http://arxiv.org/abs/2211.04869
The equation for the fluid velocity gradient along a Lagrangian trajectory immediately follows from the Navier-Stokes equation. However, such an equation involves two terms that cannot be determined from the velocity gradient along the chosen Lagrang
Externí odkaz:
http://arxiv.org/abs/2210.17336