Abstract Oceanographic relative dispersion (based on drifter separations r ) has been extensively studied, mostly finding either Richardson–Obukhov ( or enstrophy cascade [ ] scaling. Relative perturbation separation − 0 , where is the initial separation) a Batchelor scaling for times less than -dependent time. received little oceanographic attention. GPS-equipped surface drifters were repeated...

The accurate characterization of proteins in both their native and denatured states is essential to effectively understand protein function, folding and stability. As a proof of concept, a micro rheological method is applied, based on the characterization of thermal fluctuations of a micro cantilever immersed in a bovine serum albumin solution, to assess changes in the viscosity associated with...

We report basic results from new numerical simulations of passive scalar mixing at Schmidt numbers (Sc) of the order of 1000 in isotropic turbulence. The required high grid-resolution is made possible by simulating turbulence at very low Reynolds numbers, which nevertheless possesses universality in dissipative scales of motion. The results obtained are qualitatively consistent with those based...

We present direct numerical simulations of the mixing of the passive scalar at modest Taylor microscale 10 R 42 and Schmidt numbers larger than unity 2 Sc 32 . The simulations resolve below the Batchelor scale up to a factor of 4. The advecting turbulence is homogeneous and isotropic, and is maintained stationary by stochastic forcing at low wave numbers. The passive scalar is rendered stationa...

Two parametrizations for second order velocity moments, the Batchelor parametrization for the r-space structure function and a common parametrization for the energy spectrum, E(p) ∝ p exp(−p/pd), are examined and compared. In particular, we investigate corrections to the local scaling exponents induced by finite size effects. The behavior of local r– and p–space exponents differs dramatically. ...

This paper focuses on the shemza.digital project which was created and launched in 2020 by artists Aphra Shemza Stuart Batchelor. Since our last “SHEMZA DIGITAL: Participatory art as a catalyst for social change” published July 2021, has grown substantially from an online-only to national with both physical v...