yade-users team mailing list archive

[chiara modenese <c.modenese@xxxxxxxxx>]

On 25 March 2010 14:44, Sergei D. <dorofeenko@xxxxxxxxx> wrote:

> 25.03.2010 17:28, chiara modenese:
> > BTW, could not we change terminology once we define, for instance, the
> > relative velocity?
> > I would say deltaRelVelocity, instead of relativeVelocity, and
> > deltaShearDisplacement and do on if we use the incremental
> > formulation. It is less confusing (it might be better also for new
> users).
> >
> >
>
> But now we have exactly the instant relative velocity:
>
> const Vector3r relativeVelocity = (de1.vel+de1.angVel.Cross(c1x)) -
> (de2.vel+de2.angVel.Cross(c2x)) ;
> const Real normalVelocity    = geom.normal.Dot(relativeVelocity);
> const Vector3r shearVelocity    =
> relativeVelocity-normalVelocity*geom.normal;
>
> No? What is "delta"?
>
> S.
>

Yes, but as you say it is an "instant" relative velocity. Delta is a greek
word that means increment. My though was just to say it would be better to
refer the names of all those variables to an incremental formulation. But it
was just a suggestion, it is ok anyway.
I'll test my script.

Chia



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