68 citations · 489 across the 32 of their papers we have counts for
6 papers · 1 filter
Still water: dead zones and collimated ejecta from the impact of granular jets
Jake Ellowitz, Herve Turlier, Nicholas Guttenberg +2
When a dense granular jet hits a target, it forms a large dead zone and ejects a highly collimated conical sheet with a well-defined opening angle. Using experiments, simulations,…
Perfect fluid flow from granular jet impact
Jake Ellowitz, Nicholas Guttenberg, Wendy W. Zhang
Experiments on the impact of a densely-packed jet of non-cohesive grains onto a fixed target show that the impact produces an ejecta sheet comprised of particles in collimated moti…
Macroscopic effects of the spectral structure in turbulent flows
Tuan Tran, Pinaki Chakraborty, Nicholas Guttenberg +5
Two aspects of turbulent flows have been the subject of extensive, split research efforts: macroscopic properties, such as the frictional drag experienced by a flow past a wall, an…
The turbulent mean-velocity profile: it is all in the spectrum
Gustavo Gioia, Nicholas Guttenberg, Nigel Goldenfeld +1
It has long been surmised that the mean-velocity profile (MVP) of a pipe flow is closely related to the spectrum of turbulent energy. Here we perform a spectral analysis to identif…
Extreme fluctuations and the finite lifetime of the turbulent state
Nigel Goldenfeld, Nicholas Guttenberg, Gustavo Gioia
We argue that the transition to turbulence is controlled by large amplitude events that follow extreme distribution theory. The theory suggests an explanation for recent observatio…
The friction factor of two-dimensional rough-boundary turbulent soap film flows
Nicholas Guttenberg, Nigel Goldenfeld
We use momentum transfer arguments to predict the friction factor in two-dimensional turbulent soap-film flows with rough boundaries (an analogue of three-dimensional pipe flow…