#capillary

[puppytoast]

Little comic about early mornings and being late to work because the dog wouldn't let you out of bed.

[diurnalcritters]

Day 1228

Colored the last panel of my comic here on main about the roommates.

[russellmoreton]

EMERGING COSMOLOGY : Ritual, fire and stone : Human Filament 2010 by Russell Moreton Via Flickr: russellmoreton.blogspot.co.uk/ Astronomical data with outline of human form,candles,string and stones on paper.150cm x 240cm www.artreview.com/profile/RussellMoreton

[cumulus-fr]

Pov the clans infectious disease specialist is mate with a plague dragon

[earthstory]

What’s under your feet? Have you ever dug into the ground and noticed that, even in the midst of a drought, the soil is still damp? If you’re reading this and you don’t own your own lawn, please do not attempt to find out for sure. Also please do not test this on the neighbor’s lawn. (Just making sure).

This graphic from the U.S. Geological Survey labels the various parts of a shallow groundwater system. First we have the land surface where rainwater falls; this area is typically dry unless it is raining or you’re standing in a river. Below the surface there is a layer of soil that is called the vadose zone or the unsaturated zone. Soil minerals hold onto water and stay damp unless the surrounding area is completely dry, but in the vadose zone there isn’t enough water to fill all the space between soil grains. Instead, this zone stays damp by holding onto water that moved through it the last time it rained and by wicking a bit of water upwards from what lies below. The capillary zone is the source of water wicked upwards. In the capillary zone, water actually moves upwards due to electrostatic interactions between the molecules of water and the molecules in the soil, with an assist from surface tension that holds water beads together. Finally, if you dig deep enough, you reach the water table; a level where there is enough water stored that all of the space between mineral grains is filled by water. While it's shown fully blue here, it's still mostly dirt - maybe 80-90%. You might even think of it like a saturated sponge - filled with water in the gaps, but the substrate is held together by the solid part. When it rains, water moves down through the vadose zone until it reaches the water table. If it rains too much, the tiny spaces in the vadose zone can’t carry the water downward quick enough and it starts flowing over land and drains to rivers. If something is spilled on the surface or in the soil, a pollutant or fertilizer, rainwater will eventually carry that pollutant downwards to the water table below. -JBB Image credit: USGS https://wikivisually.com/wiki/Infiltration_(hydrology) https://www.usgs.gov/ecosystems/toxic-substances-hydrology-program

[necarion]

Capillary action through fabricated microstructures allows water to move easily while still exposed to the surroundings. This is awesome stuff, and because I have a one-track mind, I want to see if I can make fluid transistors out of it.

The only major limitation I can see is that you can't really do pressure-driven flows. But those suck in microfluidics anyway.

[94natygg12]

Horrorberry

[notenoughapples]

Silly milestone art for my Twitter!