How to define moving velocity-inlet
 

Hi fellows,

In my 2D simulation (VOF - 2 phase), I want to have a velocity-inlet boundary condition that moves along x-axis with speed of 0.07 m/s. During this moving the second phase liquid comes out with speed of 0.02 m/s from inlet. Would you please provide me some guidance on regarding the movement of velocity-inlet BC?
Is there a specific UDF to handle it?

Thanks