This is because power capacities are based on the standard of a 180 contact angle.

For liquid moving quickly over a surface, the contact angle can be altered from its value at rest.

There are two common methods for measuring this range of contact angles.

A more complex model is needed to measure how the apparent contact angle changes when various materials are involved.

The contact angle on a flat surface can be determined with a microscope.

Choice of depends on which fluid the contact angle is specified for.

The lower the contact angle, the higher the surface energy and more hydrophilic the material is.

The difference between these two angles is the contact angle hysteresis.

At equilibrium, the contact angle of a liquid drop on a surface does not change.

In other words, there is only one thermodynamically stable contact angle.

Thus, the contact angle changes based on the following equation:

You must have the contact angle as high as possible."

These groups believe that the apparent contact angle is largely dependent on the triple line.

This force is related to the contact angle by the following equation:

When the liquid initially meets the solid it will form some contact angle.

Hydrophilicity is indicated by smaller contact angles and higher surface energy.

Whether or not organic removal is complete can be assessed with contact angle measurements.

When an organic contaminant is present, the contact angle of water with the device will be high.

A high contact angle indicates a low solid surface energy or chemical affinity.

In the cases where the contact angle is low, more adhesion is present.

The contact angle condition on the surface is normally written as:

A wetting transition corresponds to a certain change in contact angle.

Water on hydrophobic surfaces will exhibit a high contact angle.

Another special case is where the contact angle is exactly 180 .

The observed contact angle is given by the following formula: