Dear Vincent Trincal, you may use fick's Law of diffusion. My Regards

http://www.pathwaymedicine.org/ficks-law#:~:text=Fick%27s%20Law%20essentially%20states%20that,the%20thickness%20of%20the%20membrane.

Dear Vincent Trincal, you may use fick's Law of diffusion. My Regards

http://www.pathwaymedicine.org/ficks-law#:~:text=Fick%27s%20Law%20essentially%20states%20that,the%20thickness%20of%20the%20membrane.

Vincent Trincal

The relationship between pore size (droplet size) is described by Laplace's law (capillary pressure).

https://ru.wikipedia.org/wiki/Capillary_pressure#:~:text=pc%20%3D%202σH., curvature%20 is commensurate with%20c%20molecular %20

Hello Abdelkader BOUAZIZ ,

Thanks for your reply, but I don't understand how I will be able to use this law?

The porosity of my material is filled with water, which will evaporate during the vacuum process. Depending on the size of the pores, there will be different chemical or "capillary" strengths. The smaller the pores, the harder it will be to remove water and the more the vacuum will have to be intense.. So, can you clarify your answer? Thanks in advance.

Vincent

Hello Yuri Mirgorod

Thank you for reply. I tried to understand Laplace's law, but it's to hard to me, I can't use it to answer my question (what the vacuum pressure must be to empty water-filled pores with a size of 3 nm in a cement material?). Maybe you could help me a little more?

Thanks in advance.

Vincent