code_saturne User's Forum

Posted: **Mon Jun 25, 2012 12:44 pm**

Hello,

To simplify my problem, I would like to simulate a fluid domain (in a cylinder) rotates around an object wall (see figure attached). I have one domain

IN saturne I cheched my mesh. "Med" then I chose the menu "periodic boundary" I chose "periodiqc and rotation" I gave the value 360° to "corner" then (Dx = 0, Dy = 1, Dz = 0) as the fluid turns around the axis Y. stationary mode.0

my boundary conditions are:
face higher fluid: I imposed symmetry
face infénieur fluid: I placed a wall
the outer face of fluid: wall

Is this correct? because this gives me any results !!

Posted: **Mon Jun 25, 2012 3:34 pm**

I otiened this error using GUI, plaise do you have an idea, how can imposed the rotational periodic of a fluidl

Code: Select all

Problème pour 132 face(s) périodique(s). Ces faces ont pour correspondant
périodique elles-memes. Le calcul ne pourra donc pas etre poursuivi par
Code_Saturne.
-> L'axe de la rotation ne doit pas couper une face.

Code: Select all

Problem for 132 face (s) Journal (s). These faces are periodic matching them-selves. The calculation will therefore not be pursued by
Code_Saturne.
-> The axis of rotation must not cut a face.

Posted: **Mon Jun 25, 2012 4:26 pm**

Periodicity is applied to boundary faces (which then become periodic interior faces), so periodicity of 360° has no meaning or usefulness here. You could maybe use a half cylinder and use periodicity of 180°.

In the user documentation, the way periodicity is handled is explained. You should check this to avoid confusion.

Posted: **Tue Jun 26, 2012 8:35 am**

Hello,

OK, thank's, I thought that this menu of "periodic boundary" is the equivalent of MRF (moving reference frame) for one instance, so no!

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