I have a rubber tube for which I defined cylindrical coordinates (z-along the axis, x-radial and y- azimuthal).
I need to apply a displacement on the inner face of the tube that travels like a wave along the z-axis of the tube.
The displacement is in radial direction (x-direction in my cylindrical coordinates) and travels like a wave along the axis of the tube (z-direction).
Does anyone know how to do this ?