Are you trying to have water fill the ring? maybe you could have smaller meshes of the water drops and not just a single image.
Or, if you're not after the harmonica effect, you could consider making a clipping path reveal the circle and binding the clipping path to a circle path.
What is the effect you would like to achieve? do you have any reference example close to the final effect you had in mind?
(Maybe Shiu has some better advice 😛 )