Water pool below freezing but not frozen?

[Ambaire]

The left quarter is frozen, but the rest isn't. It's the start of cycle 3 and nothing seems to have changed.

[KittenIsAGeek]

There's hysteresis coded in to ONI.  Water has to cool down past its freezing point to actually freeze, and it has to warm up above its melting point to melt.  I believe the actual numbers are 5c for melting and -5c for freezing, or something close to that.

[PhailRaptor]

I can't remember if it's 3 or 5 degrees C, but there's a buffer zone around the melt/freeze and vaporize/condense points that must be crossed before phase change occurs.

[metallichydra]

as far as i know, its there so there's not constant phase shift / change

[Gurgel]

This physical reality has a similar design: Phase-changes take quite a bit of energy, an usually significantly more than a few C of temperature change.

[KittenIsAGeek]

5 hours ago, Gurgel said:

This physical reality has a similar design: Phase-changes take quite a bit of energy, an usually significantly more than a few C of temperature change.

Yes.  Take, for example, a pot of water.  Put it on the stove and turn the heat to high. It will quickly warm up to the boiling point.  Then, until the entire pot of water boils away, it will remain fairly close to the boiling temperature despite the fact that the heat of your stove is still on high -- far longer than it took to warm the water up to that point.  

The phase change back to water from steam is far less energetic, but will still result in the area around the stove getting warmer .. and wet.  So.. if you do try this at home, have some towels available. And keep them away from the hot stove.  While fire is pretty, it can be very dangerous.  And don't let your pot boil dry.  Your pot won't like it and might get all bent out of shape and call you names.   .. You know what.. . don't try this experiment.  There's just too much that could potentially go wrong if you've been drinking.

[qda]

1 hour ago, KittenIsAGeek said:

You know what.. . don't try this experiment.  There's just too much that could potentially go wrong if you've been drinking.

Almost sounds like a story

[Maxposting]

1 hour ago, KittenIsAGeek said:

.. You know what.. . don't try this experiment.  There's just too much that could potentially go wrong if you've been drinking.