[liguifan]

Good evening,

I am trying to simulating a droplet made of oil drop into a water base.

However, I am confusing about setting up the Contact Angle between phase and between phase and wall.

for example

boundaryField
{

sideWall
{
type alphaContactAngle;
thetaProperties
(
( water air ) 90 0 0 0
( oil air ) 90 0 0 0

( water oil ) 90 0 0 0


);
value uniform 1;
}
lowerWall
{
type alphaContactAngle;
thetaProperties
(
( water air ) 90 0 0 0
( oil air ) 90 0 0 0

( water oil ) 90 0 0 0


);
value uniform 0;
}

like in the sideWall, there are (water air) 90 0 0 0. I understand the contact angle between water and air is 90 here. But in lowerWall section, there is also (water air) 90 0 0 0. what is the difference between these two (water air)? and how can I set up the contact angle between the water and the wall? (in the breakdam-one phase, I can successfully set up the contact angle between water and wall but here is a little bit different).

Can anyone give me some suggestions please?