In Situ Measurements of Coherent Structures and Turbulence
2009
Geyer, W. R. | Trowbridge, John
The long-term objective of our research is to quantify the structure of turbulence in fluvial and estuarine environments, in order to develop remote-sensing tools for environmental assessment as well as to improve numerical simulations. The objectives of this program were: (1) to quantify the turbulence length scale and turbulent dynamics in an estuary under varying stratification conditions and geometries, including relatively uniform boundary-layer flows and highly disrupted wake flow conditions; (2) to quantify the key properties of observed coherent structures, including horizontal and vertical scales, intensity of vertical motions; and (3) to provide a field-scale test of turbulence closure models and large-eddy simulations via direct measures of turbulent kinetic energy, length scale and turbulent dissipation rate combined with accurate measures of the Reynolds-averaged quantities.
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