I would like to 3d-print a structure made of two connected compartments and fill the whole thing with a liquid. Both compartments are approximately spherical but one is about 1mm3 and the other 1cm3. They will be connected by a hole of about 1 mm diameter.
I will replace the solution every two days and it's crucial that the solution I put in the big one, will also move to the small one.
Will diffusion of the solution from the large compartment to the small be severely limited when I replace it (for example, because of huge pressure on the hole which will essentially shut the small compartment)? Or is this non-sense and the solution will spread to the small compartment without problems?