[Nek5000-users] How to change the x y z coordinates to be polar

[nek5000-users at lists.mcs.anl.gov]

Dear Jian,


You can do the conversion when you process the data by taking the dot product of any (x,y,z) vector with the unit-radius vector, which is

U = (x,y)/r, where r = sqrt( x*x+y*y)


hth,


Paul


________________________________
From: Nek5000-users <nek5000-users-bounces at lists.mcs.anl.gov> on behalf of nek5000-users at lists.mcs.anl.gov <nek5000-users at lists.mcs.anl.gov>
Sent: Wednesday, January 17, 2018 11:49:03 AM
To: nek5000-users at lists.mcs.anl.gov
Subject: [Nek5000-users] How to change the x y z coordinates to be polar

Hi Nek,

Do you know how to change the result of rms to be based on polar coordinates? Currently I have x, y and z directions for the circular pipe. I have to plot the rms in axial,radial and azimuthal.

Cheers,

Jian
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