visualisation of turbulent flow

May 13, 2007

Turbulence can be found everywhere: in the sun and in a cup of coffee, in a turbine engine and in biology. How turbulence works is one of the long-standing unsolved problems for scientists and engineers.

Now, however, researchers have been able to test, experimentally, decades-old theories about how particles separate in strong turbulence; the work was done by scientists from the Max Planck Institute for Dynamics and Self-Organization in Göttingen, Germany; Cornell University in the United States; the Laboratory of Geophysical and Industrial Fluid Flows at the CNRS in Grenoble, France; and the Risø National Laboratory in Roskilde, Denmark. The scientists developed their own system of high-speed cameras; with them they showed that particles move more slowly than had previously been predicted. These results could lead to better transport and separation models of chemicals and biological substances


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