calculating TKE dissipation

I'd like to measure turbulent kinetic energy dissipation in the water column with a 2MHz ADP.  It has 160MB, so I have enough memory to collect every ping in beam coordinates at 1 sec with 10cm bins in 2m of water.  I'm not sure which is the best way to calculate TKE dissipation.  Any ideas?  The two options I am aware of are the inertial dissipation method describe in Lorke and Wuest 2005 and a structure function technique described in Wiles, Simpson, and Rippeth 2005.

Hmm,  I am not quite sure this would work very well unless you either have a very energetic environment or are using HR firmware. The standard deviation of the single-beam data will be very high and I am afraid the instrument noise will mask out the natural variability in the flow.

From a purely mathetmatical point of view, maybe the simplest approach would be to assume that the Reynolds stresses are small compared to the turbulent kinetic energy?

Best regards, Atle Lohrmann

Hi,

 Does anyone have any suggestions about how to calculate TKE from Vector ADV data? Thanks!

Take a look at some of the papers in the bibliography list: http://www.nortek-as.com/support/bibliography   Another idea is to download ExploreV and study the help section.  It was written by Alexander Sukhodolov and it is awesome

- Atle Lohrmann