postChannel adapted to annular pipe flow

fgarita · October 9, 2016, 08:43

Hi everybody,

I am setting up a LES for turbulent flow in annular pipe. After making the statistics, I have to extract a velocity profile of the time-averaged axial velocity component which should result from an average along the axial direction and along the azimuthal direction. In other words, I would need an application similar to what postChannel does, i.e. that computes the spatial average of a certain field, but that does it along axial and azimuthal directions (instead of axial and spanwise directions).

Is there any application already written or do I have to modify postChannel by myself?

Thank you,
Francesco

beatlejuice · May 20, 2018, 11:07

I am also very interested in such a utility or postChannel modification.

Has anyone already a solution for this?

And one additional question:

I have a orthogonal o-type grid near the cylinder wall and I can modify cells in axial, radial and azimuthal direction in blockmesh just by using the x y z directions.

So, I know that OpenFOAM works in Cartesian coordinates ... when I postProcess and do time averaging (LES) I get the Uprime2Mean values ... are they now for x,y,z-directions or in axial, radial, azimuthal directions like the way the grid was defined???

thanks ...

calf.Z · December 4, 2019, 07:44

Quote:

Originally Posted by beatlejuice

I am also very interested in such a utility or postChannel modification.

Has anyone already a solution for this?

thanks ...

I am also wondering about the spatial average along axial and azimuthal directions in a pipe. Can someone give an idea?

nukecrafts · February 18, 2023, 09:23

Anyone made it out after 4 years?

October 9, 2016, 08:43	postChannel adapted to annular pipe flow	#1
fgarita New Member Francesco Garita Join Date: Oct 2016 Location: Italy Posts: 8 Rep Power: 9	Hi everybody, I am setting up a LES for turbulent flow in annular pipe. After making the statistics, I have to extract a velocity profile of the time-averaged axial velocity component which should result from an average along the axial direction and along the azimuthal direction. In other words, I would need an application similar to what postChannel does, i.e. that computes the spatial average of a certain field, but that does it along axial and azimuthal directions (instead of axial and spanwise directions). Is there any application already written or do I have to modify postChannel by myself? Thank you, Francesco

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May 20, 2018, 11:07		#2
beatlejuice Member Join Date: Nov 2013 Posts: 35 Rep Power: 12	I am also very interested in such a utility or postChannel modification. Has anyone already a solution for this? And one additional question: I have a orthogonal o-type grid near the cylinder wall and I can modify cells in axial, radial and azimuthal direction in blockmesh just by using the x y z directions. So, I know that OpenFOAM works in Cartesian coordinates ... when I postProcess and do time averaging (LES) I get the Uprime2Mean values ... are they now for x,y,z-directions or in axial, radial, azimuthal directions like the way the grid was defined??? thanks ...

February 18, 2023, 09:23		#4
nukecrafts New Member Join Date: Mar 2021 Posts: 8 Rep Power: 5	Anyone made it out after 4 years?