MadSci Network: Physics |
Hi Jens,
For water not to flow through grid holes, the pressure driving the flow must be
balanced by
surface
tension. Wikipedia gives a nice description of surface
tension, how it
works and the
value for different liquids at different temperatures. The details of how large
the holes could be
and
still hold back water depends on the pressure driving the flow. If the grid is
on the bottom of a
container, what matters is how much water is sitting above it. The second
response on this
webpage does
the
calculation for one small hole.
I hope this helps!
Cheers,
Tetjana
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