36 citations · 102 across the 15 of their papers we have counts for
15 papers
Peristaltic pumping in short annular geometries: An experimental approach for studying Glymphatic flow
Shahaf Ella Salach, Ron Shnapp
Peristaltic pumping is hypothesized to drive fluid transport in several physiological systems, including cerebrospinal fluid flow through cerebral perivascular spaces (PVSs). Cereb…
Lagrangian Proper Orthogonal Decomposition
Ron Shnapp, Stefano Brizzolara
We introduce a modal representation for Lagrangian trajectories in turbulence, termed Lagrangian Proper Orthogonal Decomposition (LPOD). An ensemble of particle trajectories is use…
The Lagrangian kinetic energy cascade in Rayleigh-Bénard convection
Robin Barta, Claus Wagner, Ron Shnapp
Rayleigh-Bénard convection at high Rayleigh number exhibits turbulence superimposed on large-scale circulation. While buoyancy forces drive the flow at certain scales, how kinetic…
Velocity alignment explains Lagrangian irreversibility in turbulence
Ron Shnapp
Lagrangian particles in turbulence separate away from each other faster in the backward in time direction as compared to forward in time. In this work, we show that time irreversib…
Bubble-induced convection and flow-instability in a soft reactor
Ron Shnapp, Markus Holzner
Buoyancy-driven bubbly flows play pivotal roles in various scenarios, such as the oxygenation and mixing in the upper ocean and the reaction kinetics in chemical and bio-reactors.…
On local isotropy and scale dependence of pair dispersion in turbulent canopy flows
Ron Shnapp, Alex Liberzon, Yardena Bohbot-Raviv +1
Canopy flows in the atmospheric surface layer play important economic and ecological roles, governing the dispersion of passive scalars in the environment. The interaction of high-…
Universal alignment in turbulent pair dispersion
Ron Shnapp, Stefano Brizzolara, Marius M. Neamtu-Halic +2
Countless processes in nature and industry, from rain droplet nucleation to plankton interaction in the ocean, are intimately related to turbulent fluctuations of local concentrati…
Clustering through pair interactions in swimming zooplankton
Ron Shnapp, François-Gaël Michalec, Markus Holzner
This work focuses on the formation of mating aggregates in zooplankton. In particular, sexual encounters are behaviourally supported by males actively swimming in search for female…
Splitting of localized disturbances in viscoelastic channel flow
Ron Shnapp, Victor Steinberg
We examine the response of an inertia-less viscoelastic channel flow to localized perturbations. A simplified model shows that the non-linear interaction between the velocity and e…
Non-modal elastic instability and elastic waves in weakly perturbed channel flow
Ron Shnapp, Victor Steinberg
In this paper, we present experimental results and reveal that strong perturbations are not necessary for elastic instability to occur in straight-channel, inertialess, visco-elast…
On small-scale and large-scale intermittency of Lagrangian statistics in canopy flow
Ron Shnapp
The interaction of fluids with surface-mounted obstacles in canopy flows leads to strong turbulence that dominates dispersion and mixing in the neutrally stable atmospheric surface…
Turbulence -- Obstacle Interactions in the Lagrangian Framework: Applications for Stochastic Modeling in Canopy Flows
Ron Shnapp, Yardena Bohbot-Raviv, Alex Liberzon +1
Lagrangian stochastic models are widely used to predict and analyze turbulent dispersion in complex environments, such as in various terrestrial and marine canopy flows. However, d…
Extended 3D-PTV for direct measurements of Lagrangian statistics of canopy turbulence in a wind tunnel
Ron Shnapp, Erez Shapira, David Peri +3
Direct estimation of Lagrangian turbulence statistics is essential for the proper modeling of dispersion and transport in highly obstructed canopy flows. However, Lagrangian flow m…
Generalization of Turbulent Pair Dispersion to Large Initial Separations
Ron Shnapp, Alex Liberzon
We present a generalization of turbulent pair dispersion to large initial separations (), by introducing a new time scale, , that reflects the persistence of i…
Detailed comparative study and a mechanistic model of resuspension of spherical particles from rough and smooth surfaces
Ron Shnapp, Alex Liberzon
Resuspension of solid particles by a tornado-like vortex from surfaces of different roughness is studied using a three-dimensional particle tracking velocimetry (3D-PTV) method. By…