Small scale velocity jumps in shear turbulence.
We measure structure functions and structures in uniformly sheared strong turbulence using an array of hot-wire velocity sensors. We find that the large-scale shear persists down to the smallest scales. There is a marked asymmetry between velocity increments measured in the shear direction, and those measured in the plane perpendicular to it. In the shear direction the scaling exponents tend to a constant, signifying the presence of small-scale cliffs. Direct evidence for those is presented by the spatial structure of the strongest velocity gradients.
Staicu
Adrian
A
Physics Department, Eindhoven University of Technology, Postbus 513, 5600 MB Eindhoven, The Netherlands.
van de Water
Willem
W