I Surface tension and water (the smallest hole water will flow through)

AI Thread Summary
The discussion focuses on determining the smallest gap through which water can flow, specifically in relation to a 3D-printed cube that leaks due to layer lines. The user observed that a three-walled cube held water for seven days without leaks, suggesting that the spacing between layers must be less than half a micron. Measurements indicate potential leak gaps of 1.5 to 2 microns, but the user suspects the actual gap could be smaller due to material compression. The goal is to find a mathematical equation to accurately define the minimum gap size for water flow. Understanding these parameters is crucial for the user's project.
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I am trying to find out what the smallest hole water will flow through. not a molecule of water, just water in general. Here is an example. I have a single walled cube that i 3d printed. When i put water in it, it leaks between the layer lines. I want to find out what the spacing between the layer lines is, because with a SEM scope i used at school, they look pretty solid. see attached image. So I am trying to figure out how small the space is. This is with regular tap water. I need to mention that a 3 walled cube held water indefinitely. Well, it sat for 7 days with no leaks, and then it started to slowly evaporate. We watched it very very close in lab. This means that at 3 walls, the spacing must be less than half a micron is my guess. so water flows through at least 1.5 microns but stops at a certain gap size, that's the size I am trying to find. not sure if it is 0.5 microns, or even smaller

thanks
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using some cad software, i measured one of the cusps where it could potentially leak, and i got roughly 1.5 to 2 microns.

but I am guessing the gap could be smaller due to squish.

trying to find a decent math equation and answer to help me with a project
 
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