Introduction Monday 21 st 9-10am Turbulence theory Monday 21 st 11-12am Measuring turbulence Monday 28 th 9-10am Modelling turbulence Monday 28 th 11-12am . Marine Turbulence and Mixing. 3 . Measuring turbulence. Dr. Matthew Palmer firstname.lastname@example.org.
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Shear driven instability
Big Whorls Have Little Whorls
Big whorls have little whorls
That feed on their velocity,
And little whorls have lesser whorls
And so on to viscosity.
Dissipation to heat
The cascade of energy from the largest turbulent eddy to the Kolmogorov microscale is termed the inertial subrange;
The cascade of energy from large to small scales by the process of vortex stretching. The integral of S represents the total amount of energy dissipated, e.
This method depends on highly sensitive piezo-electric probes that produce a variable voltage relative to the lateral flow, or shear, across the probe
As the profiler descends, the probes interact with the range of turbulent eddies within the inertial sub-range.
The dissipation rate of TKE, , can then be derived from the variance of the shear-
Where m = kinematic
viscosity of sea water,
c = speed of sound in seawater~1500ms-1
Converting radial velocity to Cartesian coordinates
Problem: turbulent flows are unlikely to satisfy stationarity over large distances (>L)