The critical point

[sniffnoy]

I really want to see a critical point demonstration where you have, like, a rectangle of some fluid, and somehow you have a temperature gradient across one dimension, and a pressure gradient across another, with the critical point in the middle, so that like you can see that there is a phase boundary that runs across part of it until it stops in the middle.

...is that possible? Because I really want to see what that looks like.

Comments

[pklemica]

I'm not sure how you could maintain a pressure gradient across a rectangle of fluid, unless it was actually a bunch of small rectangles near each other each with their own separated regulated environment?

[armiphlage]

Maybe divide the rectangle of fluid into an array of sealed containers, to allow you to maintain the temperature and pressure separately in each one? Not continuous, but it'd let you show them closer to what's on a phase diagram.