[cfdstar]

Hi,

I am working on post-processing of a transient 3D problem. I need to extract the time-series of a flow variable (for instance, temperature) over a curved-line. In other words, I need to extract the distribution of a flow-variable over a curved-line every time-step. I wonder if there is a way to that in Tecplot. Any idea/help?

[wsfowler]

You can do this with a Tecplot Macro. The code below assumes that your dataset uses StrandID and Solution Time so Tecplot recognizes it as transient data.

The only alteration you should have to make to this macro is to change the RAWDATA section to reflect the number of points along the curve and the points defining your curve. This will result in one new zone per timestep.

If you're dealing with 2D data, change EXTRACTTHROUGHVOLUME to 'NO' and supply only XY coordinates instead of XYZ.

Hope this helps.
Scott

#!MC 1410
$!EXTENDEDCOMMAND COMMANDPROCESSORID='extend time mcr'
  COMMAND='QUERY.NUMTIMESTEPS NumTimeSteps'
$!LOOP |NumTimeSteps|
  $!EXTENDEDCOMMAND COMMANDPROCESSORID='extend time mcr'
    COMMAND='SET.CURTIMESTEP |LOOP|'
  $!EXTRACTFROMPOLYLINE
    EXTRACTLINEPOINTSONLY = YES
    EXTRACTTHROUGHVOLUME = YES
RAWDATA
3
.25 .75 .75
.5 .5 .5
.75 .5 .25
$!ENDLOOP