yade-users team mailing list archive

[Jérôme Duriez <question663459@xxxxxxxxxxxxxxxxxxxxx>]

Question #663459 on Yade changed:
https://answers.launchpad.net/yade/+question/663459

    Status: Open => Answered

Jérôme Duriez proposed the following answer:
Hi Luc,

On a general note regarding periodic boundaries, I do not think it is
meaningful to consider that Paverage has a particular value in your
cell. The cell is just a finite-sized window into an infinite problem,
the latter showing a periodic pattern. The problem actually showing the
exact same behaviours from one finite sized window to another.

Then, with an imposed pressure gradient in periodic boundaries, the
window you're looking at may show a average pressure value P, but you
could as well have chosen another window with an average pressure P +
gradP * cellLength.

Obviously, I'm guessing here that your periodic simulation depends on
(is affected by) the pressure gradient only, and not by the the average
value.

But, as a matter of fact, I think that a problem that would depend both
on pressure gradient and pressure average could not be simulated using
periodic boundaries, since such a problem would not show a periodic
pattern from one cell (or window) to another.


Jérôme

-- 
You received this question notification because your team yade-users is
an answer contact for Yade.