109 citations · 427 across the 13 of their papers we have counts for
13 papers
On the large-scale sweeping of small-scale eddies in turbulence -- A filtering approach
Theodore D. Drivas, Perry L. Johnson, Cristian C. Lalescu +1
We present an analysis of the Navier-Stokes equations based on a spatial filtering technique to elucidate the multi-scale nature of fully developed turbulence. In particular, the a…
New Exact Betchov-like Relation for the Helicity Flux in Homogeneous Turbulence
Damiano Capocci, Perry L. Johnson, Sean Oughton +2
In homogeneous and isotropic turbulence, the relative contributions of different physical mechanisms to the energy cascade can be quantified by an exact decomposition of the energy…
On the enhancement of boundary layer skin friction by turbulence: an angular momentum approach
Ahmed Elnahhas, Perry L. Johnson
Turbulence enhances the wall shear stress in boundary layers, significantly increasing the drag on streamlined bodies. Other flow features such as freestream pressure gradients and…
A physics-inspired alternative to spatial filtering for large-eddy simulations of turbulent flows
Perry L. Johnson
Large-eddy simulations (LES) are widely-used for computing high Reynolds number turbulent flows. Spatial filtering theory for LES is not without its shortcomings, including how to…
On the role of vorticity stretching and strain self-amplification in the turbulence energy cascade
Perry L. Johnson
The tendency of turbulent flows to produce fine-scale motions from large-scale energy injection is often viewed as a scale-wise cascade of kinetic energy driven by vorticity stretc…
Identifying and tracking bubbles and drops in simulations: a toolbox for obtaining sizes, lineages, and breakup and coalescence statistics
Wai Hong Ronald Chan, Michael S. Dodd, Perry L. Johnson +1
Knowledge of bubble and drop size distributions in two-phase flows is important for characterizing a wide range of phenomena, including combustor ignition, sonar communication, and…