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When analyzing 2D data output in Blue Kenue, extracting U and V velocity components using Tools>Calculator is simple enough. However, it seems there must be a different processes to extract U, V, and W when analyzing 3D data...is this true? When I select my VELOCITY UVW data object in BK, the Tools>Calculator option is not available...am I missing something? I know the data are there because I can query the values by clicking on grid nodes.

Sorry but calculator support for 3D Telemac objects hasn't been implemented yet.

In the meantime,

Option 1:
You can extract 2D individual layers see "Tools->Extract Layer" to
obtain a UV field.

Option 2:
You can also extract timeseries at a point.
Select any point as you normally would and then
use "Tools->Extract TimeSeries->At Selected Point"
This will generate a ts2 object with 2 additional hidden attributes.
(ts2 is normally only U and V, actually mag&dir)
Select the ts2 object and then "<right-click>->Show Attribute Table"

The resulting table contains <timestamp>, horizontal scalar speed, direction, W and node elevation.
This can then can be saved to an ASCII file for further processing.

Option 3:
You can save the current frame as an ASCII t4v file.
Use "File->Save Copy As"
t4v is a tetrahedral mesh file. (very similar in layout to t3s format)

First section defines node information ie X, Y, Z, U, V, W
Second section defines tetrahedral elements n1,n2,n3,n4


Hope this helps.
Cheers... Martin

Perfect! Option 3 seems to be what I need. Thanks, Martin.

-Ben