Re: [yt-users] velocity fields in yt

Yes, it could be off by 0.5*dx. To calculate it correctly, do you need to center the velocity field by re-filling boundary values? On Wed, Aug 3, 2011 at 5:23 PM, Elizabeth Tasker wrote:

Although actually, "RadialVelocity" is one place where it would also be an issue. It doesn't look like that is corrected for Zeus, if x-velocity etc are still face-centred. Am I reading that right?

Elizabeth Tasker wrote:

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I was wondering if the x-velocity, y-velocity and z-velocity fields themselves had been averaged to give a cell-centred quantity. There's no need for them to be so, I just needed to know before I calculated a cross-product to find the rotational potential of clouds I'd picked out.

Thank you for the clarification :)

Elizabeth

Matthew Turk wrote:

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Only in the DivV and VoritictySquared fields.  Where else should it be made?

On Wed, Aug 3, 2011 at 5:04 PM, Elizabeth Tasker wrote:

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Hi,

Quick question about the baryon velocity fields in yt: has any correction been made for the fact Zeus uses face-centred, not cell-centred, velocities?

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