Professor at Departamento de Física, FCEN, UBA, and researcher of CONICET
These are some images of hydrodynamic turbulence (click on the images to see them at full resolution). Most are from numerical simulations using up to 20483 grid points and were published in 2005 and in 2008 (see also the references therein). One of these images was used by Ian Stewart in his book “Visions of Infinity: The Great Mathematical Problems” to illustrate the complexity of a turbulent flow.
Rotating and stratified turbulence
Rotating and stratified turbulence develops slanted layers in the velocity and the temperature fields (and pancake-like structures in the absence of rotation). Below are some images of simulations of stratified turbulence, published in a recent paper in Physics of Fluids, and in another paper in 2014.
Flows in a rotating frame transfer energy preferentially towards two-dimensional modes, developing strong anisotropy and column-like structures. The images below were rendered using data from simulations with up to 15363 grid points, and compare the effect of rotation in helical and in non-helical flows. Recently we also studied the recovery of isotropy at small scales in a simulation or rotating turbulence at very large Reynolds number, using 30723 grid points. Images from these simulations were used by Peter Davidson in his books “Turbulence in Rotating, Stratified and Electrically Conducting Fluids” and “Turbulence: An Introduction for Scientists and Engineers (2nd Edition)”.
Recently, with Pablo Cobelli we started building a laboratory to study geophysical turbulence and wave turbulence. The laboratory already has a tank to study surface wave turbulence, and several fast cameras to do surface profilometry. The first paper using only data from our laboratory was published in 2015.