C***7
发帖数: 241 | 1 请问在真空里(相对于在空气里)，水和固体的接触角(CONTACT ANGLE)有何改变啊？
Thanks a lot! | N***r
发帖数: 2539 | 2 the contact angle of a water-air-solid system is determined by Young-Laplace
eqn, and is a function of water-air surface tension, air-solid surface
tension and water-solid surface tension.
comparing your two cases, water-vacuum and water-air, two parameters change,
water-air -> water-vacuum, and air-solid -> vacuum-solid.
u may need some detailed analysis.
btw, liquid can't stay in vacuum long, it's gonna evaporate anyway.
in this case, the problem turns to a water-vapor-solid system.
【在 C***7 的大作中提到】
: 请问在真空里(相对于在空气里)，水和固体的接触角(CONTACT ANGLE)有何改变啊？
: Thanks a lot!
| J****i
发帖数: 470 | 3 不错不错。呵呵。真空下压力基本都小于液体的饱和压力，和cavitation一样。
Laplace
change,
【在 N***r 的大作中提到】
: the contact angle of a water-air-solid system is determined by Young-Laplace
: eqn, and is a function of water-air surface tension, air-solid surface
: tension and water-solid surface tension.
: comparing your two cases, water-vacuum and water-air, two parameters change,
: water-air -> water-vacuum, and air-solid -> vacuum-solid.
: u may need some detailed analysis.
: btw, liquid can't stay in vacuum long, it's gonna evaporate anyway.
: in this case, the problem turns to a water-vapor-solid system.
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