After creating the nCloth flag, you can dynamically animate it to flap in the wind by altering certain Dynamic Properties and Maya Nucleus solver Gravity and Wind properties.
To make nCloth appear to wave and flap in the wind
Mass specifies the density of the flag and Tangential Drag biases the amount of drag applied to the flag relative to the surface tangent, which is necessary otherwise the flat plane will not have any wind resistance.
You can increase the speed at which the flag flaps, as well as the amount of ripples moving across the flag’s surface, by increasing the Maya Nucleus solver’s Wind Speed.
The flag rises quickly into the air, appearing to be tugged by the increased dynamic air flow. The flag now waves and flaps forcefully, and ripples appear on its surface.