# Create packing with given void ratio at different isotropic pressures

Hello everyone,

I am Antrox and a new member of this forum.

I just started using YADE and more generally DEM, and I would like some clarifications to my doubts if possible.

I created a periodic cell and I am using a regular orthogonal packing by using a given particle radius, which I do not want to change.

By applying O.cell.

1) therefore, is it correct to affirm that I could have a regular packing with any isotropic pressure I decided ?

2) then, after reaching the target isotropic pressure,, I tried to apply an ideal shearing by O.cell.

3) if so, I would like to obtain the desired void ratio at a given isotropic pressure without changing the particle radius. What is the best approach?

thanks in advance

## Question information

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- Yade Edit question

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- Solved by:
- Jan Stránský

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