Output data file on the line of the example
 

As we know, we could get the data file after we set the 'writeinterval', i.e. 0.1, 0.2...data directory.
Now when I open the U file in 0.5 directory, I could see that they are (ux, uy,uz) in 'internalField', but I do not know where is the position of these velocity data?
By the way, after I practice 2.1.5.7 plotting graphs, I want to output the data in this line, so that I could use other software (e.g. Excel) to deal with these data, but I do not know how to output?
Thank you for your attention for the above two questions.