4 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…