I want to plot rms velocity plots for turbulenct channel flow. At what part of the channel should i plot this data. I have been told to plot the data on a line cutting through the centre of the domain, is this correct??

If you are using an straight channel with circular cross section, it's OK because the solution is axisimetric.

good luck

Its a straight rectangular section with periodic boundaries in stream and spanwise directions. Is that ok?

David, I don't undestand the periodic boundary in spanwise direction. Is an open channel with cross flow?

Sorry, I was confused about you first question, because i was thinking about a circular straight close channel and to plot the rms velocity in a line inside a cross section.

But I think you should plor the rms velocity in a cross section